Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem

49 files changed, 1672 insertions, 1362 deletions

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 596660d37c5e..0f78e34220c9 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2810,14 +2810,6 @@ static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
 	if (conn) {
 		hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
 
-		hci_dev_lock(hdev);
-		if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
-		    !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
-			mgmt_device_connected(hdev, &conn->dst, conn->type,
-					      conn->dst_type, 0, NULL, 0,
-					      conn->dev_class);
-		hci_dev_unlock(hdev);
-
 		/* Send to upper protocol */
 		l2cap_recv_acldata(conn, skb, flags);
 		return;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 705078a0cc39..81b44481d0d9 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -2688,7 +2688,7 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
 	if (ev->opcode != HCI_OP_NOP)
 		del_timer(&hdev->cmd_timer);
 
-	if (ev->ncmd) {
+	if (ev->ncmd && !test_bit(HCI_RESET, &hdev->flags)) {
 		atomic_set(&hdev->cmd_cnt, 1);
 		if (!skb_queue_empty(&hdev->cmd_q))
 			queue_work(hdev->workqueue, &hdev->cmd_work);
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index b2bcbe2dc328..a7352ff3fd1e 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -931,7 +931,7 @@ static int hidp_setup_hid(struct hidp_session *session,
 	hid->version = req->version;
 	hid->country = req->country;
 
-	strncpy(hid->name, req->name, 128);
+	strncpy(hid->name, req->name, sizeof(req->name) - 1);
 
 	snprintf(hid->phys, sizeof(hid->phys), "%pMR",
 		 &bt_sk(session->ctrl_sock->sk)->src);
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 2c78208d793e..22e658322845 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -3727,6 +3727,17 @@ sendresp:
 static int l2cap_connect_req(struct l2cap_conn *conn,
 			     struct l2cap_cmd_hdr *cmd, u8 *data)
 {
+	struct hci_dev *hdev = conn->hcon->hdev;
+	struct hci_conn *hcon = conn->hcon;
+
+	hci_dev_lock(hdev);
+	if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
+	    !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &hcon->flags))
+		mgmt_device_connected(hdev, &hcon->dst, hcon->type,
+				      hcon->dst_type, 0, NULL, 0,
+				      hcon->dev_class);
+	hci_dev_unlock(hdev);
+
 	l2cap_connect(conn, cmd, data, L2CAP_CONN_RSP, 0);
 	return 0;
 }
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 531a93d613d4..57f250c20e39 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -352,7 +352,7 @@ static void __sco_sock_close(struct sock *sk)
 
 	case BT_CONNECTED:
 	case BT_CONFIG:
-		if (sco_pi(sk)->conn) {
+		if (sco_pi(sk)->conn->hcon) {
 			sk->sk_state = BT_DISCONN;
 			sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
 			hci_conn_put(sco_pi(sk)->conn->hcon);
diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c
index eb9df22418f0..2f0ccbc5f13e 100644
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -149,16 +149,133 @@ void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
 	rcu_assign_pointer(sta->ampdu_mlme.tid_tx[tid], tid_tx);
 }
 
+static inline int ieee80211_ac_from_tid(int tid)
+{
+	return ieee802_1d_to_ac[tid & 7];
+}
+
+/*
+ * When multiple aggregation sessions on multiple stations
+ * are being created/destroyed simultaneously, we need to
+ * refcount the global queue stop caused by that in order
+ * to not get into a situation where one of the aggregation
+ * setup or teardown re-enables queues before the other is
+ * ready to handle that.
+ *
+ * These two functions take care of this issue by keeping
+ * a global "agg_queue_stop" refcount.
+ */
+static void __acquires(agg_queue)
+ieee80211_stop_queue_agg(struct ieee80211_sub_if_data *sdata, int tid)
+{
+	int queue = sdata->vif.hw_queue[ieee80211_ac_from_tid(tid)];
+
+	if (atomic_inc_return(&sdata->local->agg_queue_stop[queue]) == 1)
+		ieee80211_stop_queue_by_reason(
+			&sdata->local->hw, queue,
+			IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
+	__acquire(agg_queue);
+}
+
+static void __releases(agg_queue)
+ieee80211_wake_queue_agg(struct ieee80211_sub_if_data *sdata, int tid)
+{
+	int queue = sdata->vif.hw_queue[ieee80211_ac_from_tid(tid)];
+
+	if (atomic_dec_return(&sdata->local->agg_queue_stop[queue]) == 0)
+		ieee80211_wake_queue_by_reason(
+			&sdata->local->hw, queue,
+			IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
+	__release(agg_queue);
+}
+
+/*
+ * splice packets from the STA's pending to the local pending,
+ * requires a call to ieee80211_agg_splice_finish later
+ */
+static void __acquires(agg_queue)
+ieee80211_agg_splice_packets(struct ieee80211_sub_if_data *sdata,
+			     struct tid_ampdu_tx *tid_tx, u16 tid)
+{
+	struct ieee80211_local *local = sdata->local;
+	int queue = sdata->vif.hw_queue[ieee80211_ac_from_tid(tid)];
+	unsigned long flags;
+
+	ieee80211_stop_queue_agg(sdata, tid);
+
+	if (WARN(!tid_tx,
+		 "TID %d gone but expected when splicing aggregates from the pending queue\n",
+		 tid))
+		return;
+
+	if (!skb_queue_empty(&tid_tx->pending)) {
+		spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+		/* copy over remaining packets */
+		skb_queue_splice_tail_init(&tid_tx->pending,
+					   &local->pending[queue]);
+		spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+	}
+}
+
+static void __releases(agg_queue)
+ieee80211_agg_splice_finish(struct ieee80211_sub_if_data *sdata, u16 tid)
+{
+	ieee80211_wake_queue_agg(sdata, tid);
+}
+
+static void ieee80211_remove_tid_tx(struct sta_info *sta, int tid)
+{
+	struct tid_ampdu_tx *tid_tx;
+
+	lockdep_assert_held(&sta->ampdu_mlme.mtx);
+	lockdep_assert_held(&sta->lock);
+
+	tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+
+	/*
+	 * When we get here, the TX path will not be lockless any more wrt.
+	 * aggregation, since the OPERATIONAL bit has long been cleared.
+	 * Thus it will block on getting the lock, if it occurs. So if we
+	 * stop the queue now, we will not get any more packets, and any
+	 * that might be being processed will wait for us here, thereby
+	 * guaranteeing that no packets go to the tid_tx pending queue any
+	 * more.
+	 */
+
+	ieee80211_agg_splice_packets(sta->sdata, tid_tx, tid);
+
+	/* future packets must not find the tid_tx struct any more */
+	ieee80211_assign_tid_tx(sta, tid, NULL);
+
+	ieee80211_agg_splice_finish(sta->sdata, tid);
+
+	kfree_rcu(tid_tx, rcu_head);
+}
+
 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
-				    enum ieee80211_back_parties initiator,
-				    bool tx)
+				    enum ieee80211_agg_stop_reason reason)
 {
 	struct ieee80211_local *local = sta->local;
 	struct tid_ampdu_tx *tid_tx;
+	enum ieee80211_ampdu_mlme_action action;
 	int ret;
 
 	lockdep_assert_held(&sta->ampdu_mlme.mtx);
 
+	switch (reason) {
+	case AGG_STOP_DECLINED:
+	case AGG_STOP_LOCAL_REQUEST:
+	case AGG_STOP_PEER_REQUEST:
+		action = IEEE80211_AMPDU_TX_STOP_CONT;
+		break;
+	case AGG_STOP_DESTROY_STA:
+		action = IEEE80211_AMPDU_TX_STOP_FLUSH;
+		break;
+	default:
+		WARN_ON_ONCE(1);
+		return -EINVAL;
+	}
+
 	spin_lock_bh(&sta->lock);
 
 	tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
@@ -167,10 +284,19 @@ int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
 		return -ENOENT;
 	}
 
-	/* if we're already stopping ignore any new requests to stop */
+	/*
+	 * if we're already stopping ignore any new requests to stop
+	 * unless we're destroying it in which case notify the driver
+	 */
 	if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) {
 		spin_unlock_bh(&sta->lock);
-		return -EALREADY;
+		if (reason != AGG_STOP_DESTROY_STA)
+			return -EALREADY;
+		ret = drv_ampdu_action(local, sta->sdata,
+				       IEEE80211_AMPDU_TX_STOP_FLUSH_CONT,
+				       &sta->sta, tid, NULL, 0);
+		WARN_ON_ONCE(ret);
+		goto remove_tid_tx;
 	}
 
 	if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
@@ -212,11 +338,12 @@ int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
 	 */
 	synchronize_net();
 
-	tid_tx->stop_initiator = initiator;
-	tid_tx->tx_stop = tx;
+	tid_tx->stop_initiator = reason == AGG_STOP_PEER_REQUEST ?
+					WLAN_BACK_RECIPIENT :
+					WLAN_BACK_INITIATOR;
+	tid_tx->tx_stop = reason == AGG_STOP_LOCAL_REQUEST;
 
-	ret = drv_ampdu_action(local, sta->sdata,
-			       IEEE80211_AMPDU_TX_STOP,
+	ret = drv_ampdu_action(local, sta->sdata, action,
 			       &sta->sta, tid, NULL, 0);
 
 	/* HW shall not deny going back to legacy */
@@ -227,7 +354,14 @@ int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
 		 */
 	}
 
-	return ret;
+	if (reason == AGG_STOP_DESTROY_STA) {
+ remove_tid_tx:
+		spin_lock_bh(&sta->lock);
+		ieee80211_remove_tid_tx(sta, tid);
+		spin_unlock_bh(&sta->lock);
+	}
+
+	return 0;
 }
 
 /*
@@ -264,80 +398,6 @@ static void sta_addba_resp_timer_expired(unsigned long data)
 	rcu_read_unlock();
 }
 
-static inline int ieee80211_ac_from_tid(int tid)
-{
-	return ieee802_1d_to_ac[tid & 7];
-}
-
-/*
- * When multiple aggregation sessions on multiple stations
- * are being created/destroyed simultaneously, we need to
- * refcount the global queue stop caused by that in order
- * to not get into a situation where one of the aggregation
- * setup or teardown re-enables queues before the other is
- * ready to handle that.
- *
- * These two functions take care of this issue by keeping
- * a global "agg_queue_stop" refcount.
- */
-static void __acquires(agg_queue)
-ieee80211_stop_queue_agg(struct ieee80211_sub_if_data *sdata, int tid)
-{
-	int queue = sdata->vif.hw_queue[ieee80211_ac_from_tid(tid)];
-
-	if (atomic_inc_return(&sdata->local->agg_queue_stop[queue]) == 1)
-		ieee80211_stop_queue_by_reason(
-			&sdata->local->hw, queue,
-			IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
-	__acquire(agg_queue);
-}
-
-static void __releases(agg_queue)
-ieee80211_wake_queue_agg(struct ieee80211_sub_if_data *sdata, int tid)
-{
-	int queue = sdata->vif.hw_queue[ieee80211_ac_from_tid(tid)];
-
-	if (atomic_dec_return(&sdata->local->agg_queue_stop[queue]) == 0)
-		ieee80211_wake_queue_by_reason(
-			&sdata->local->hw, queue,
-			IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
-	__release(agg_queue);
-}
-
-/*
- * splice packets from the STA's pending to the local pending,
- * requires a call to ieee80211_agg_splice_finish later
- */
-static void __acquires(agg_queue)
-ieee80211_agg_splice_packets(struct ieee80211_sub_if_data *sdata,
-			     struct tid_ampdu_tx *tid_tx, u16 tid)
-{
-	struct ieee80211_local *local = sdata->local;
-	int queue = sdata->vif.hw_queue[ieee80211_ac_from_tid(tid)];
-	unsigned long flags;
-
-	ieee80211_stop_queue_agg(sdata, tid);
-
-	if (WARN(!tid_tx,
-		 "TID %d gone but expected when splicing aggregates from the pending queue\n",
-		 tid))
-		return;
-
-	if (!skb_queue_empty(&tid_tx->pending)) {
-		spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
-		/* copy over remaining packets */
-		skb_queue_splice_tail_init(&tid_tx->pending,
-					   &local->pending[queue]);
-		spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
-	}
-}
-
-static void __releases(agg_queue)
-ieee80211_agg_splice_finish(struct ieee80211_sub_if_data *sdata, u16 tid)
-{
-	ieee80211_wake_queue_agg(sdata, tid);
-}
-
 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
 {
 	struct tid_ampdu_tx *tid_tx;
@@ -660,14 +720,13 @@ void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
 
 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
-				   enum ieee80211_back_parties initiator,
-				   bool tx)
+				   enum ieee80211_agg_stop_reason reason)
 {
 	int ret;
 
 	mutex_lock(&sta->ampdu_mlme.mtx);
 
-	ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator, tx);
+	ret = ___ieee80211_stop_tx_ba_session(sta, tid, reason);
 
 	mutex_unlock(&sta->ampdu_mlme.mtx);
 
@@ -751,24 +810,7 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
 		ieee80211_send_delba(sta->sdata, ra, tid,
 			WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
 
-	/*
-	 * When we get here, the TX path will not be lockless any more wrt.
-	 * aggregation, since the OPERATIONAL bit has long been cleared.
-	 * Thus it will block on getting the lock, if it occurs. So if we
-	 * stop the queue now, we will not get any more packets, and any
-	 * that might be being processed will wait for us here, thereby
-	 * guaranteeing that no packets go to the tid_tx pending queue any
-	 * more.
-	 */
-
-	ieee80211_agg_splice_packets(sta->sdata, tid_tx, tid);
-
-	/* future packets must not find the tid_tx struct any more */
-	ieee80211_assign_tid_tx(sta, tid, NULL);
-
-	ieee80211_agg_splice_finish(sta->sdata, tid);
-
-	kfree_rcu(tid_tx, rcu_head);
+	ieee80211_remove_tid_tx(sta, tid);
 
  unlock_sta:
 	spin_unlock_bh(&sta->lock);
@@ -868,8 +910,7 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local,
 		}
 
 	} else {
-		___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR,
-						false);
+		___ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_DECLINED);
 	}
 
  out:
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 47e0aca614b7..661b878bd19c 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -164,7 +164,17 @@ static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 			sta = sta_info_get(sdata, mac_addr);
 		else
 			sta = sta_info_get_bss(sdata, mac_addr);
-		if (!sta) {
+		/*
+		 * The ASSOC test makes sure the driver is ready to
+		 * receive the key. When wpa_supplicant has roamed
+		 * using FT, it attempts to set the key before
+		 * association has completed, this rejects that attempt
+		 * so it will set the key again after assocation.
+		 *
+		 * TODO: accept the key if we have a station entry and
+		 *       add it to the device after the station.
+		 */
+		if (!sta || !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 			ieee80211_key_free(sdata->local, key);
 			err = -ENOENT;
 			goto out_unlock;
@@ -510,6 +520,7 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 				BIT(NL80211_STA_FLAG_WME) |
 				BIT(NL80211_STA_FLAG_MFP) |
 				BIT(NL80211_STA_FLAG_AUTHENTICATED) |
+				BIT(NL80211_STA_FLAG_ASSOCIATED) |
 				BIT(NL80211_STA_FLAG_TDLS_PEER);
 	if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
 		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
@@ -521,6 +532,8 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
 	if (test_sta_flag(sta, WLAN_STA_AUTH))
 		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
+	if (test_sta_flag(sta, WLAN_STA_ASSOC))
+		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
 	if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
 		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
 }
@@ -930,6 +943,7 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
 
 	sdata->vif.bss_conf.beacon_int = params->beacon_interval;
 	sdata->vif.bss_conf.dtim_period = params->dtim_period;
+	sdata->vif.bss_conf.enable_beacon = true;
 
 	sdata->vif.bss_conf.ssid_len = params->ssid_len;
 	if (params->ssid_len)
@@ -1010,8 +1024,15 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
 		kfree_rcu(old_probe_resp, rcu_head);
 
 	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
-		sta_info_flush(local, vlan);
-	sta_info_flush(local, sdata);
+		sta_info_flush_defer(vlan);
+	sta_info_flush_defer(sdata);
+	rcu_barrier();
+	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
+		sta_info_flush_cleanup(vlan);
+	sta_info_flush_cleanup(sdata);
+
+	sdata->vif.bss_conf.enable_beacon = false;
+	clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
 	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
 
 	drv_stop_ap(sdata->local, sdata);
@@ -1069,6 +1090,58 @@ static void ieee80211_send_layer2_update(struct sta_info *sta)
 	netif_rx_ni(skb);
 }
 
+static int sta_apply_auth_flags(struct ieee80211_local *local,
+				struct sta_info *sta,
+				u32 mask, u32 set)
+{
+	int ret;
+
+	if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
+	    set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
+	    !test_sta_flag(sta, WLAN_STA_AUTH)) {
+		ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
+		if (ret)
+			return ret;
+	}
+
+	if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
+	    set & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
+	    !test_sta_flag(sta, WLAN_STA_ASSOC)) {
+		ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
+		if (ret)
+			return ret;
+	}
+
+	if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
+		if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
+			ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
+		else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
+			ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
+		else
+			ret = 0;
+		if (ret)
+			return ret;
+	}
+
+	if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
+	    !(set & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
+	    test_sta_flag(sta, WLAN_STA_ASSOC)) {
+		ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
+		if (ret)
+			return ret;
+	}
+
+	if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
+	    !(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
+	    test_sta_flag(sta, WLAN_STA_AUTH)) {
+		ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
 static int sta_apply_parameters(struct ieee80211_local *local,
 				struct sta_info *sta,
 				struct station_parameters *params)
@@ -1086,52 +1159,20 @@ static int sta_apply_parameters(struct ieee80211_local *local,
 	mask = params->sta_flags_mask;
 	set = params->sta_flags_set;
 
-	/*
-	 * In mesh mode, we can clear AUTHENTICATED flag but must
-	 * also make ASSOCIATED follow appropriately for the driver
-	 * API. See also below, after AUTHORIZED changes.
-	 */
-	if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED)) {
-		/* cfg80211 should not allow this in non-mesh modes */
-		if (WARN_ON(!ieee80211_vif_is_mesh(&sdata->vif)))
-			return -EINVAL;
-
-		if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
-		    !test_sta_flag(sta, WLAN_STA_AUTH)) {
-			ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
-			if (ret)
-				return ret;
-			ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
-			if (ret)
-				return ret;
-		}
-	}
-
-	if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
-		if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
-			ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
-		else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
-			ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
-		if (ret)
-			return ret;
-	}
-
-	if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED)) {
-		/* cfg80211 should not allow this in non-mesh modes */
-		if (WARN_ON(!ieee80211_vif_is_mesh(&sdata->vif)))
-			return -EINVAL;
-
-		if (!(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
-		    test_sta_flag(sta, WLAN_STA_AUTH)) {
-			ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
-			if (ret)
-				return ret;
-			ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
-			if (ret)
-				return ret;
-		}
+	if (ieee80211_vif_is_mesh(&sdata->vif)) {
+		/*
+		 * In mesh mode, ASSOCIATED isn't part of the nl80211
+		 * API but must follow AUTHENTICATED for driver state.
+		 */
+		if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED))
+			mask |= BIT(NL80211_STA_FLAG_ASSOCIATED);
+		if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
+			set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
 	}
 
+	ret = sta_apply_auth_flags(local, sta, mask, set);
+	if (ret)
+		return ret;
 
 	if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
 		if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
@@ -1177,10 +1218,11 @@ static int sta_apply_parameters(struct ieee80211_local *local,
 		sta->sta.aid = params->aid;
 
 	/*
-	 * FIXME: updating the following information is racy when this
-	 *	  function is called from ieee80211_change_station().
-	 *	  However, all this information should be static so
-	 *	  maybe we should just reject attemps to change it.
+	 * Some of the following updates would be racy if called on an
+	 * existing station, via ieee80211_change_station(). However,
+	 * all such changes are rejected by cfg80211 except for updates
+	 * changing the supported rates on an existing but not yet used
+	 * TDLS peer.
 	 */
 
 	if (params->listen_interval >= 0)
@@ -1211,18 +1253,33 @@ static int sta_apply_parameters(struct ieee80211_local *local,
 
 	if (ieee80211_vif_is_mesh(&sdata->vif)) {
 #ifdef CONFIG_MAC80211_MESH
-		if (sdata->u.mesh.security & IEEE80211_MESH_SEC_SECURED)
+		if (sdata->u.mesh.security & IEEE80211_MESH_SEC_SECURED) {
+			u32 changed = 0;
+
 			switch (params->plink_state) {
-			case NL80211_PLINK_LISTEN:
 			case NL80211_PLINK_ESTAB:
+				if (sta->plink_state != NL80211_PLINK_ESTAB)
+					changed = mesh_plink_inc_estab_count(
+							sdata);
+				sta->plink_state = params->plink_state;
+				break;
+			case NL80211_PLINK_LISTEN:
 			case NL80211_PLINK_BLOCKED:
+			case NL80211_PLINK_OPN_SNT:
+			case NL80211_PLINK_OPN_RCVD:
+			case NL80211_PLINK_CNF_RCVD:
+			case NL80211_PLINK_HOLDING:
+				if (sta->plink_state == NL80211_PLINK_ESTAB)
+					changed = mesh_plink_dec_estab_count(
+							sdata);
 				sta->plink_state = params->plink_state;
 				break;
 			default:
 				/*  nothing  */
 				break;
 			}
-		else
+			ieee80211_bss_info_change_notify(sdata, changed);
+		} else {
 			switch (params->plink_action) {
 			case PLINK_ACTION_OPEN:
 				mesh_plink_open(sta);
@@ -1231,6 +1288,7 @@ static int sta_apply_parameters(struct ieee80211_local *local,
 				mesh_plink_block(sta);
 				break;
 			}
+		}
 #endif
 	}
 
@@ -1265,6 +1323,10 @@ static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 	if (!sta)
 		return -ENOMEM;
 
+	/*
+	 * defaults -- if userspace wants something else we'll
+	 * change it accordingly in sta_apply_parameters()
+	 */
 	sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
 	sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
 
@@ -1301,7 +1363,6 @@ static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
 				 u8 *mac)
 {
-	struct ieee80211_local *local = wiphy_priv(wiphy);
 	struct ieee80211_sub_if_data *sdata;
 
 	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
@@ -1309,7 +1370,7 @@ static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
 	if (mac)
 		return sta_info_destroy_addr_bss(sdata, mac);
 
-	sta_info_flush(local, sdata);
+	sta_info_flush(sdata);
 	return 0;
 }
 
@@ -1615,6 +1676,9 @@ static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
 	memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
 						sizeof(setup->mcast_rate));
 
+	sdata->vif.bss_conf.beacon_int = setup->beacon_interval;
+	sdata->vif.bss_conf.dtim_period = setup->dtim_period;
+
 	return 0;
 }
 
@@ -2197,7 +2261,8 @@ static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 
-	if (sdata->vif.type != NL80211_IFTYPE_STATION)
+	if (sdata->vif.type != NL80211_IFTYPE_STATION &&
+	    sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 		return -EOPNOTSUPP;
 
 	if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS))
diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index 80e55527504b..1bfe0a8b19d2 100644
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -381,7 +381,8 @@ void ieee80211_iter_chan_contexts_atomic(
 
 	rcu_read_lock();
 	list_for_each_entry_rcu(ctx, &local->chanctx_list, list)
-		iter(hw, &ctx->conf, iter_data);
+		if (ctx->driver_present)
+			iter(hw, &ctx->conf, iter_data);
 	rcu_read_unlock();
 }
 EXPORT_SYMBOL_GPL(ieee80211_iter_chan_contexts_atomic);
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 698dc7e6f309..0c07f94c5378 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -207,6 +207,14 @@ static inline void drv_bss_info_changed(struct ieee80211_local *local,
 {
 	might_sleep();
 
+	WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
+				BSS_CHANGED_BEACON_ENABLED) &&
+		     sdata->vif.type != NL80211_IFTYPE_AP &&
+		     sdata->vif.type != NL80211_IFTYPE_ADHOC &&
+		     sdata->vif.type != NL80211_IFTYPE_MESH_POINT);
+	WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE &&
+		     changed & ~BSS_CHANGED_IDLE);
+
 	check_sdata_in_driver(sdata);
 
 	trace_drv_bss_info_changed(local, sdata, info, changed);
@@ -913,6 +921,8 @@ static inline int drv_add_chanctx(struct ieee80211_local *local,
 	if (local->ops->add_chanctx)
 		ret = local->ops->add_chanctx(&local->hw, &ctx->conf);
 	trace_drv_return_int(local, ret);
+	if (!ret)
+		ctx->driver_present = true;
 
 	return ret;
 }
@@ -924,6 +934,7 @@ static inline void drv_remove_chanctx(struct ieee80211_local *local,
 	if (local->ops->remove_chanctx)
 		local->ops->remove_chanctx(&local->hw, &ctx->conf);
 	trace_drv_return_void(local);
+	ctx->driver_present = false;
 }
 
 static inline void drv_change_chanctx(struct ieee80211_local *local,
@@ -931,8 +942,10 @@ static inline void drv_change_chanctx(struct ieee80211_local *local,
 				      u32 changed)
 {
 	trace_drv_change_chanctx(local, ctx, changed);
-	if (local->ops->change_chanctx)
+	if (local->ops->change_chanctx) {
+		WARN_ON_ONCE(!ctx->driver_present);
 		local->ops->change_chanctx(&local->hw, &ctx->conf, changed);
+	}
 	trace_drv_return_void(local);
 }
 
@@ -945,10 +958,12 @@ static inline int drv_assign_vif_chanctx(struct ieee80211_local *local,
 	check_sdata_in_driver(sdata);
 
 	trace_drv_assign_vif_chanctx(local, sdata, ctx);
-	if (local->ops->assign_vif_chanctx)
+	if (local->ops->assign_vif_chanctx) {
+		WARN_ON_ONCE(!ctx->driver_present);
 		ret = local->ops->assign_vif_chanctx(&local->hw,
 						     &sdata->vif,
 						     &ctx->conf);
+	}
 	trace_drv_return_int(local, ret);
 
 	return ret;
@@ -961,10 +976,12 @@ static inline void drv_unassign_vif_chanctx(struct ieee80211_local *local,
 	check_sdata_in_driver(sdata);
 
 	trace_drv_unassign_vif_chanctx(local, sdata, ctx);
-	if (local->ops->unassign_vif_chanctx)
+	if (local->ops->unassign_vif_chanctx) {
+		WARN_ON_ONCE(!ctx->driver_present);
 		local->ops->unassign_vif_chanctx(&local->hw,
 						 &sdata->vif,
 						 &ctx->conf);
+	}
 	trace_drv_return_void(local);
 }
 
diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
index a71d891794a4..61ac7c48ac0c 100644
--- a/net/mac80211/ht.c
+++ b/net/mac80211/ht.c
@@ -62,6 +62,9 @@ void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
 	__check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SUP_WIDTH_20_40);
 	__check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_40);
 
+	/* Allow user to disable SGI-20 (SGI-40 is handled above) */
+	__check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_20);
+
 	/* Allow user to disable the max-AMSDU bit. */
 	__check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_MAX_AMSDU);
 
@@ -117,6 +120,21 @@ void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
 		   IEEE80211_HT_CAP_SGI_20 |
 		   IEEE80211_HT_CAP_SGI_40 |
 		   IEEE80211_HT_CAP_DSSSCCK40));
+
+	/* Unset 40 MHz if we're not using a 40 MHz channel */
+	switch (sdata->vif.bss_conf.chandef.width) {
+	case NL80211_CHAN_WIDTH_20_NOHT:
+	case NL80211_CHAN_WIDTH_20:
+		ht_cap->cap &= ~IEEE80211_HT_CAP_SGI_40;
+		ht_cap->cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+		break;
+	case NL80211_CHAN_WIDTH_40:
+	case NL80211_CHAN_WIDTH_80:
+	case NL80211_CHAN_WIDTH_80P80:
+	case NL80211_CHAN_WIDTH_160:
+		break;
+	}
+
 	/*
 	 * The STBC bits are asymmetric -- if we don't have
 	 * TX then mask out the peer's RX and vice versa.
@@ -179,16 +197,19 @@ void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
 	ieee80211_apply_htcap_overrides(sdata, ht_cap);
 }
 
-void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx)
+void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
+					 enum ieee80211_agg_stop_reason reason)
 {
 	int i;
 
 	cancel_work_sync(&sta->ampdu_mlme.work);
 
 	for (i = 0; i <  IEEE80211_NUM_TIDS; i++) {
-		__ieee80211_stop_tx_ba_session(sta, i, WLAN_BACK_INITIATOR, tx);
+		__ieee80211_stop_tx_ba_session(sta, i, reason);
 		__ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
-					       WLAN_REASON_QSTA_LEAVE_QBSS, tx);
+					       WLAN_REASON_QSTA_LEAVE_QBSS,
+					       reason != AGG_STOP_DESTROY_STA &&
+					       reason != AGG_STOP_PEER_REQUEST);
 	}
 }
 
@@ -245,8 +266,7 @@ void ieee80211_ba_session_work(struct work_struct *work)
 		if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP,
 						 &tid_tx->state))
 			___ieee80211_stop_tx_ba_session(sta, tid,
-							WLAN_BACK_INITIATOR,
-							true);
+							AGG_STOP_LOCAL_REQUEST);
 	}
 	mutex_unlock(&sta->ampdu_mlme.mtx);
 }
@@ -314,8 +334,7 @@ void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
 		__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
 					       true);
 	else
-		__ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
-					       true);
+		__ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST);
 }
 
 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 6b7644e818d8..b4b866f41919 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -67,7 +67,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 	skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
 
 	if (!ether_addr_equal(ifibss->bssid, bssid))
-		sta_info_flush(sdata->local, sdata);
+		sta_info_flush(sdata);
 
 	/* if merging, indicate to driver that we leave the old IBSS */
 	if (sdata->vif.bss_conf.ibss_joined) {
@@ -191,6 +191,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 
 	rcu_assign_pointer(ifibss->presp, skb);
 
+	sdata->vif.bss_conf.enable_beacon = true;
 	sdata->vif.bss_conf.beacon_int = beacon_int;
 	sdata->vif.bss_conf.basic_rates = basic_rates;
 	bss_change = BSS_CHANGED_BEACON_INT;
@@ -425,11 +426,9 @@ static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata,
 }
 
 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
-				  struct ieee80211_mgmt *mgmt,
-				  size_t len,
+				  struct ieee80211_mgmt *mgmt, size_t len,
 				  struct ieee80211_rx_status *rx_status,
-				  struct ieee802_11_elems *elems,
-				  bool beacon)
+				  struct ieee802_11_elems *elems)
 {
 	struct ieee80211_local *local = sdata->local;
 	int freq;
@@ -530,7 +529,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
 	}
 
 	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
-					channel, beacon);
+					channel);
 	if (!bss)
 		return;
 
@@ -877,14 +876,21 @@ static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
 	ieee80211_tx_skb(sdata, skb);
 }
 
-static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
-					 struct ieee80211_mgmt *mgmt,
-					 size_t len,
-					 struct ieee80211_rx_status *rx_status)
+static
+void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_mgmt *mgmt, size_t len,
+				    struct ieee80211_rx_status *rx_status)
 {
 	size_t baselen;
 	struct ieee802_11_elems elems;
 
+	BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) !=
+		     offsetof(typeof(mgmt->u.beacon), variable));
+
+	/*
+	 * either beacon or probe_resp but the variable field is at the
+	 * same offset
+	 */
 	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
 	if (baselen > len)
 		return;
@@ -892,25 +898,7 @@ static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
 	ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
 				&elems);
 
-	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
-}
-
-static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
-				     struct ieee80211_mgmt *mgmt,
-				     size_t len,
-				     struct ieee80211_rx_status *rx_status)
-{
-	size_t baselen;
-	struct ieee802_11_elems elems;
-
-	/* Process beacon from the current BSS */
-	baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
-	if (baselen > len)
-		return;
-
-	ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
-
-	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
+	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
 }
 
 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
@@ -934,12 +922,9 @@ void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
 		ieee80211_rx_mgmt_probe_req(sdata, skb);
 		break;
 	case IEEE80211_STYPE_PROBE_RESP:
-		ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
-					     rx_status);
-		break;
 	case IEEE80211_STYPE_BEACON:
-		ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
-					 rx_status);
+		ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len,
+					       rx_status);
 		break;
 	case IEEE80211_STYPE_AUTH:
 		ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len);
@@ -1182,7 +1167,7 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
 	memset(ifibss->bssid, 0, ETH_ALEN);
 	ifibss->ssid_len = 0;
 
-	sta_info_flush(sdata->local, sdata);
+	sta_info_flush(sdata);
 
 	spin_lock_bh(&ifibss->incomplete_lock);
 	while (!list_empty(&ifibss->incomplete_stations)) {
@@ -1205,6 +1190,8 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
 	RCU_INIT_POINTER(sdata->u.ibss.presp, NULL);
 	sdata->vif.bss_conf.ibss_joined = false;
 	sdata->vif.bss_conf.ibss_creator = false;
+	sdata->vif.bss_conf.enable_beacon = false;
+	clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
 	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED |
 						BSS_CHANGED_IBSS);
 	synchronize_rcu();
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 8563b9a5cac3..63f0430c131e 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -405,6 +405,8 @@ struct ieee80211_mgd_assoc_data {
 
 	u8 ap_ht_param;
 
+	struct ieee80211_vht_cap ap_vht_cap;
+
 	size_t ie_len;
 	u8 ie[];
 };
@@ -659,10 +661,13 @@ enum ieee80211_sub_if_data_flags {
  *	change handling while the interface is up
  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
  *	mode, so queues are stopped
+ * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
+ *	to offchannel, reset when offchannel returns
  */
 enum ieee80211_sdata_state_bits {
 	SDATA_STATE_RUNNING,
 	SDATA_STATE_OFFCHANNEL,
+	SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
 };
 
 /**
@@ -685,6 +690,7 @@ struct ieee80211_chanctx {
 
 	enum ieee80211_chanctx_mode mode;
 	int refcount;
+	bool driver_present;
 
 	struct ieee80211_chanctx_conf conf;
 };
@@ -783,6 +789,11 @@ struct ieee80211_sub_if_data {
 		struct dentry *default_mgmt_key;
 	} debugfs;
 #endif
+
+#ifdef CONFIG_PM
+	struct ieee80211_bss_conf suspend_bss_conf;
+#endif
+
 	/* must be last, dynamically sized area in this! */
 	struct ieee80211_vif vif;
 };
@@ -1346,8 +1357,7 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
 			  struct ieee80211_mgmt *mgmt,
 			  size_t len,
 			  struct ieee802_11_elems *elems,
-			  struct ieee80211_channel *channel,
-			  bool beacon);
+			  struct ieee80211_channel *channel);
 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 			  struct ieee80211_bss *bss);
 
@@ -1358,10 +1368,8 @@ int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
 
 /* off-channel helpers */
-void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local,
-				    bool offchannel_ps_enable);
-void ieee80211_offchannel_return(struct ieee80211_local *local,
-				 bool offchannel_ps_disable);
+void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
+void ieee80211_offchannel_return(struct ieee80211_local *local);
 void ieee80211_roc_setup(struct ieee80211_local *local);
 void ieee80211_start_next_roc(struct ieee80211_local *local);
 void ieee80211_roc_purge(struct ieee80211_sub_if_data *sdata);
@@ -1422,7 +1430,8 @@ void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
 				     u16 initiator, u16 reason, bool stop);
 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
 				    u16 initiator, u16 reason, bool stop);
-void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx);
+void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
+					 enum ieee80211_agg_stop_reason reason);
 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
 			     struct sta_info *sta,
 			     struct ieee80211_mgmt *mgmt, size_t len);
@@ -1436,11 +1445,9 @@ void ieee80211_process_addba_request(struct ieee80211_local *local,
 				     size_t len);
 
 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
-				   enum ieee80211_back_parties initiator,
-				   bool tx);
+				   enum ieee80211_agg_stop_reason reason);
 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
-				    enum ieee80211_back_parties initiator,
-				    bool tx);
+				    enum ieee80211_agg_stop_reason reason);
 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
 void ieee80211_ba_session_work(struct work_struct *work);
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 8be854e86cd9..06fac2991d40 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -747,7 +747,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 	unsigned long flags;
 	struct sk_buff *skb, *tmp;
 	u32 hw_reconf_flags = 0;
-	int i;
+	int i, flushed;
 
 	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 
@@ -772,11 +772,15 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 	 * (because if we remove a STA after ops->remove_interface()
 	 * the driver will have removed the vif info already!)
 	 *
-	 * This is relevant only in AP, WDS and mesh modes, since in
-	 * all other modes we've already removed all stations when
-	 * disconnecting etc.
+	 * This is relevant only in WDS mode, in all other modes we've
+	 * already removed all stations when disconnecting or similar,
+	 * so warn otherwise.
+	 *
+	 * We call sta_info_flush_cleanup() later, to combine RCU waits.
 	 */
-	sta_info_flush(local, sdata);
+	flushed = sta_info_flush_defer(sdata);
+	WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
+		     (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
 
 	/*
 	 * Don't count this interface for promisc/allmulti while it
@@ -859,11 +863,17 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 		cancel_work_sync(&sdata->work);
 		/*
 		 * When we get here, the interface is marked down.
-		 * Call synchronize_rcu() to wait for the RX path
-		 * should it be using the interface and enqueuing
-		 * frames at this very time on another CPU.
+		 *
+		 * sta_info_flush_cleanup() requires rcu_barrier()
+		 * first to wait for the station call_rcu() calls
+		 * to complete, here we need at least sychronize_rcu()
+		 * it to wait for the RX path in case it is using the
+		 * interface and enqueuing frames at this very time on
+		 * another CPU.
 		 */
-		synchronize_rcu();
+		rcu_barrier();
+		sta_info_flush_cleanup(sdata);
+
 		skb_queue_purge(&sdata->skb_queue);
 
 		/*
@@ -961,7 +971,6 @@ static void ieee80211_set_multicast_list(struct net_device *dev)
  */
 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
 {
-	struct ieee80211_local *local = sdata->local;
 	int flushed;
 	int i;
 
@@ -977,7 +986,7 @@ static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
 	if (ieee80211_vif_is_mesh(&sdata->vif))
 		mesh_rmc_free(sdata);
 
-	flushed = sta_info_flush(local, sdata);
+	flushed = sta_info_flush(sdata);
 	WARN_ON(flushed);
 }
 
@@ -1218,6 +1227,7 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
 	case NL80211_IFTYPE_AP:
 		skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
 		INIT_LIST_HEAD(&sdata->u.ap.vlans);
+		sdata->vif.bss_conf.bssid = sdata->vif.addr;
 		break;
 	case NL80211_IFTYPE_P2P_CLIENT:
 		type = NL80211_IFTYPE_STATION;
@@ -1225,9 +1235,11 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
 		sdata->vif.p2p = true;
 		/* fall through */
 	case NL80211_IFTYPE_STATION:
+		sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
 		ieee80211_sta_setup_sdata(sdata);
 		break;
 	case NL80211_IFTYPE_ADHOC:
+		sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
 		ieee80211_ibss_setup_sdata(sdata);
 		break;
 	case NL80211_IFTYPE_MESH_POINT:
@@ -1241,8 +1253,12 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
 				      MONITOR_FLAG_OTHER_BSS;
 		break;
 	case NL80211_IFTYPE_WDS:
+		sdata->vif.bss_conf.bssid = NULL;
+		break;
 	case NL80211_IFTYPE_AP_VLAN:
+		break;
 	case NL80211_IFTYPE_P2P_DEVICE:
+		sdata->vif.bss_conf.bssid = sdata->vif.addr;
 		break;
 	case NL80211_IFTYPE_UNSPECIFIED:
 	case NUM_NL80211_IFTYPES:
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 1b087fff93e7..39cfe8f10ad2 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -207,76 +207,10 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 				      u32 changed)
 {
 	struct ieee80211_local *local = sdata->local;
-	static const u8 zero[ETH_ALEN] = { 0 };
 
 	if (!changed)
 		return;
 
-	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
-		sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
-	} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
-		sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
-	else if (sdata->vif.type == NL80211_IFTYPE_AP)
-		sdata->vif.bss_conf.bssid = sdata->vif.addr;
-	else if (sdata->vif.type == NL80211_IFTYPE_WDS)
-		sdata->vif.bss_conf.bssid = NULL;
-	else if (ieee80211_vif_is_mesh(&sdata->vif)) {
-		sdata->vif.bss_conf.bssid = zero;
-	} else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
-		sdata->vif.bss_conf.bssid = sdata->vif.addr;
-		WARN_ONCE(changed & ~(BSS_CHANGED_IDLE),
-			  "P2P Device BSS changed %#x", changed);
-	} else {
-		WARN_ON(1);
-		return;
-	}
-
-	switch (sdata->vif.type) {
-	case NL80211_IFTYPE_AP:
-	case NL80211_IFTYPE_ADHOC:
-	case NL80211_IFTYPE_WDS:
-	case NL80211_IFTYPE_MESH_POINT:
-		break;
-	default:
-		/* do not warn to simplify caller in scan.c */
-		changed &= ~BSS_CHANGED_BEACON_ENABLED;
-		if (WARN_ON(changed & BSS_CHANGED_BEACON))
-			return;
-		break;
-	}
-
-	if (changed & BSS_CHANGED_BEACON_ENABLED) {
-		if (local->quiescing || !ieee80211_sdata_running(sdata) ||
-		    test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) {
-			sdata->vif.bss_conf.enable_beacon = false;
-		} else {
-			/*
-			 * Beacon should be enabled, but AP mode must
-			 * check whether there is a beacon configured.
-			 */
-			switch (sdata->vif.type) {
-			case NL80211_IFTYPE_AP:
-				sdata->vif.bss_conf.enable_beacon =
-					!!sdata->u.ap.beacon;
-				break;
-			case NL80211_IFTYPE_ADHOC:
-				sdata->vif.bss_conf.enable_beacon =
-					!!sdata->u.ibss.presp;
-				break;
-#ifdef CONFIG_MAC80211_MESH
-			case NL80211_IFTYPE_MESH_POINT:
-				sdata->vif.bss_conf.enable_beacon =
-					!!sdata->u.mesh.mesh_id_len;
-				break;
-#endif
-			default:
-				/* not reached */
-				WARN_ON(1);
-				break;
-			}
-		}
-	}
-
 	drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 }
 
@@ -537,6 +471,7 @@ static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 
 	.cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 				IEEE80211_HT_CAP_MAX_AMSDU |
+				IEEE80211_HT_CAP_SGI_20 |
 				IEEE80211_HT_CAP_SGI_40),
 	.mcs = {
 		.rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
@@ -606,7 +541,8 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 	wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 			   NL80211_FEATURE_SAE |
 			   NL80211_FEATURE_HT_IBSS |
-			   NL80211_FEATURE_VIF_TXPOWER;
+			   NL80211_FEATURE_VIF_TXPOWER |
+			   NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 
 	if (!ops->hw_scan)
 		wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 649ad513547f..694e27376afa 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -20,16 +20,11 @@
 int mesh_allocated;
 static struct kmem_cache *rm_cache;
 
-#ifdef CONFIG_MAC80211_MESH
 bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
 {
 	return (mgmt->u.action.u.mesh_action.action_code ==
 			WLAN_MESH_ACTION_HWMP_PATH_SELECTION);
 }
-#else
-bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
-{ return false; }
-#endif
 
 void ieee80211s_init(void)
 {
@@ -607,6 +602,12 @@ void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	struct ieee80211_local *local = sdata->local;
+	u32 changed = BSS_CHANGED_BEACON |
+		      BSS_CHANGED_BEACON_ENABLED |
+		      BSS_CHANGED_HT |
+		      BSS_CHANGED_BASIC_RATES |
+		      BSS_CHANGED_BEACON_INT;
+	enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
 
 	local->fif_other_bss++;
 	/* mesh ifaces must set allmulti to forward mcast traffic */
@@ -624,15 +625,16 @@ void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
 	ieee80211_queue_work(&local->hw, &sdata->work);
 	sdata->vif.bss_conf.ht_operation_mode =
 				ifmsh->mshcfg.ht_opmode;
-	sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL;
+	sdata->vif.bss_conf.enable_beacon = true;
 	sdata->vif.bss_conf.basic_rates =
-		ieee80211_mandatory_rates(sdata->local,
-					  ieee80211_get_sdata_band(sdata));
-	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON |
-						BSS_CHANGED_BEACON_ENABLED |
-						BSS_CHANGED_HT |
-						BSS_CHANGED_BASIC_RATES |
-						BSS_CHANGED_BEACON_INT);
+		ieee80211_mandatory_rates(local, band);
+
+	if (band == IEEE80211_BAND_5GHZ) {
+		sdata->vif.bss_conf.use_short_slot = true;
+		changed |= BSS_CHANGED_ERP_SLOT;
+	}
+
+	ieee80211_bss_info_change_notify(sdata, changed);
 
 	netif_carrier_on(sdata->dev);
 }
@@ -646,10 +648,12 @@ void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
 
 	/* stop the beacon */
 	ifmsh->mesh_id_len = 0;
+	sdata->vif.bss_conf.enable_beacon = false;
+	clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
 	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
 
 	/* flush STAs and mpaths on this iface */
-	sta_info_flush(sdata->local, sdata);
+	sta_info_flush(sdata);
 	mesh_path_flush_by_iface(sdata);
 
 	del_timer_sync(&sdata->u.mesh.housekeeping_timer);
@@ -805,6 +809,7 @@ void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local)
 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	static u8 zero_addr[ETH_ALEN] = {};
 
 	setup_timer(&ifmsh->housekeeping_timer,
 		    ieee80211_mesh_housekeeping_timer,
@@ -830,4 +835,6 @@ void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
 	INIT_LIST_HEAD(&ifmsh->preq_queue.list);
 	spin_lock_init(&ifmsh->mesh_preq_queue_lock);
 	spin_lock_init(&ifmsh->sync_offset_lock);
+
+	sdata->vif.bss_conf.bssid = zero_addr;
 }
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index 84c28c6101cd..aff301544c7f 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -191,8 +191,6 @@ struct mesh_rmc {
 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
 
-#define MESH_DEFAULT_BEACON_INTERVAL		1000 	/* in 1024 us units */
-
 #define MESH_PATH_EXPIRE (600 * HZ)
 
 /* Default maximum number of plinks per interface */
@@ -307,6 +305,20 @@ extern int mesh_paths_generation;
 #ifdef CONFIG_MAC80211_MESH
 extern int mesh_allocated;
 
+static inline
+u32 mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
+{
+	atomic_inc(&sdata->u.mesh.estab_plinks);
+	return mesh_accept_plinks_update(sdata);
+}
+
+static inline
+u32 mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
+{
+	atomic_dec(&sdata->u.mesh.estab_plinks);
+	return mesh_accept_plinks_update(sdata);
+}
+
 static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
 {
 	return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 47aeee2d8db1..6b4603a90031 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -215,16 +215,19 @@ static void prepare_frame_for_deferred_tx(struct ieee80211_sub_if_data *sdata,
 	skb->priority = 7;
 
 	info->control.vif = &sdata->vif;
+	info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
 	ieee80211_set_qos_hdr(sdata, skb);
 }
 
 /**
- * mesh_send_path error - Sends a PERR mesh management frame
+ * mesh_path_error_tx - Sends a PERR mesh management frame
  *
+ * @ttl: allowed remaining hops
  * @target: broken destination
  * @target_sn: SN of the broken destination
  * @target_rcode: reason code for this PERR
  * @ra: node this frame is addressed to
+ * @sdata: local mesh subif
  *
  * Note: This function may be called with driver locks taken that the driver
  * also acquires in the TX path.  To avoid a deadlock we don't transmit the
@@ -246,11 +249,13 @@ int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn,
 		return -EAGAIN;
 
 	skb = dev_alloc_skb(local->tx_headroom +
+			    IEEE80211_ENCRYPT_HEADROOM +
+			    IEEE80211_ENCRYPT_TAILROOM +
 			    hdr_len +
 			    2 + 15 /* PERR IE */);
 	if (!skb)
 		return -1;
-	skb_reserve(skb, local->tx_headroom);
+	skb_reserve(skb, local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM);
 	mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
 	memset(mgmt, 0, hdr_len);
 	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
@@ -350,6 +355,7 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local,
  * @sdata: local mesh subif
  * @mgmt: mesh management frame
  * @hwmp_ie: hwmp information element (PREP or PREQ)
+ * @action: type of hwmp ie
  *
  * This function updates the path routing information to the originator and the
  * transmitter of a HWMP PREQ or PREP frame.
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index 4b274e9c91a5..9e0416696a83 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -41,20 +41,6 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
 		enum ieee80211_self_protected_actioncode action,
 		u8 *da, __le16 llid, __le16 plid, __le16 reason);
 
-static inline
-u32 mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
-{
-	atomic_inc(&sdata->u.mesh.estab_plinks);
-	return mesh_accept_plinks_update(sdata);
-}
-
-static inline
-u32 mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
-{
-	atomic_dec(&sdata->u.mesh.estab_plinks);
-	return mesh_accept_plinks_update(sdata);
-}
-
 /**
  * mesh_plink_fsm_restart - restart a mesh peer link finite state machine
  *
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index a3552929a21d..e930175771ff 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -199,11 +199,11 @@ static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
 	case NL80211_CHAN_WIDTH_40:
 		if (sdata->vif.bss_conf.chandef.chan->center_freq >
 				sdata->vif.bss_conf.chandef.center_freq1 &&
-		    chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
+		    chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
 			disable_40 = true;
 		if (sdata->vif.bss_conf.chandef.chan->center_freq <
 				sdata->vif.bss_conf.chandef.center_freq1 &&
-		    chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
+		    chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
 			disable_40 = true;
 		break;
 	default:
@@ -341,11 +341,13 @@ static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 
 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 				 struct sk_buff *skb,
-				 struct ieee80211_supported_band *sband)
+				 struct ieee80211_supported_band *sband,
+				 struct ieee80211_vht_cap *ap_vht_cap)
 {
 	u8 *pos;
 	u32 cap;
 	struct ieee80211_sta_vht_cap vht_cap;
+	int i;
 
 	BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 
@@ -364,6 +366,42 @@ static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 	}
 
+	/*
+	 * Some APs apparently get confused if our capabilities are better
+	 * than theirs, so restrict what we advertise in the assoc request.
+	 */
+	if (!(ap_vht_cap->vht_cap_info &
+			cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
+		cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
+
+	if (!(ap_vht_cap->vht_cap_info &
+			cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
+		cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
+			 IEEE80211_VHT_CAP_RXSTBC_3 |
+			 IEEE80211_VHT_CAP_RXSTBC_4);
+
+	for (i = 0; i < 8; i++) {
+		int shift = i * 2;
+		u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
+		u16 ap_mcs, our_mcs;
+
+		ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
+								mask) >> shift;
+		our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
+								mask) >> shift;
+
+		switch (ap_mcs) {
+		default:
+			if (our_mcs <= ap_mcs)
+				break;
+			/* fall through */
+		case IEEE80211_VHT_MCS_NOT_SUPPORTED:
+			vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
+			vht_cap.vht_mcs.rx_mcs_map |=
+				cpu_to_le16(ap_mcs << shift);
+		}
+	}
+
 	/* reserve and fill IE */
 	pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 	ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
@@ -562,7 +600,8 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 				    sband, chan, sdata->smps_mode);
 
 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
-		ieee80211_add_vht_ie(sdata, skb, sband);
+		ieee80211_add_vht_ie(sdata, skb, sband,
+				     &assoc_data->ap_vht_cap);
 
 	/* if present, add any custom non-vendor IEs that go after HT */
 	if (assoc_data->ie_len && assoc_data->ie) {
@@ -1486,7 +1525,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	sta = sta_info_get(sdata, ifmgd->bssid);
 	if (sta) {
 		set_sta_flag(sta, WLAN_STA_BLOCK_BA);
-		ieee80211_sta_tear_down_BA_sessions(sta, false);
+		ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
 	}
 	mutex_unlock(&local->sta_mtx);
 
@@ -1521,7 +1560,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	memset(ifmgd->bssid, 0, ETH_ALEN);
 
 	/* remove AP and TDLS peers */
-	sta_info_flush(local, sdata);
+	sta_info_flush_defer(sdata);
 
 	/* finally reset all BSS / config parameters */
 	changed |= ieee80211_reset_erp_info(sdata);
@@ -2369,8 +2408,7 @@ ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
 				  struct ieee80211_mgmt *mgmt, size_t len,
 				  struct ieee80211_rx_status *rx_status,
-				  struct ieee802_11_elems *elems,
-				  bool beacon)
+				  struct ieee802_11_elems *elems)
 {
 	struct ieee80211_local *local = sdata->local;
 	int freq;
@@ -2404,7 +2442,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
 		return;
 
 	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
-					channel, beacon);
+					channel);
 	if (bss)
 		ieee80211_rx_bss_put(local, bss);
 
@@ -2447,7 +2485,7 @@ static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
 	ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
 				&elems);
 
-	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
+	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
 
 	if (ifmgd->associated &&
 	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
@@ -2528,8 +2566,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 		ieee802_11_parse_elems(mgmt->u.beacon.variable,
 				       len - baselen, &elems);
 
-		ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
-				      false);
+		ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
 		ifmgd->assoc_data->have_beacon = true;
 		ifmgd->assoc_data->sent_assoc = false;
 		/* continue assoc process */
@@ -2682,8 +2719,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 	ifmgd->beacon_crc = ncrc;
 	ifmgd->beacon_crc_valid = true;
 
-	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
-			      true);
+	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
 
 	if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
 				     elems.wmm_param_len))
@@ -3756,7 +3792,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_bss *bss = (void *)req->bss->priv;
 	struct ieee80211_mgd_assoc_data *assoc_data;
 	struct ieee80211_supported_band *sband;
-	const u8 *ssidie, *ht_ie;
+	const u8 *ssidie, *ht_ie, *vht_ie;
 	int i, err;
 
 	assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
@@ -3875,6 +3911,12 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 			((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
 	else
 		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+	vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
+	if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
+		memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
+		       sizeof(struct ieee80211_vht_cap));
+	else
+		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 	rcu_read_unlock();
 
 	if (bss->wmm_used && bss->uapsd_supported &&
diff --git a/net/mac80211/offchannel.c b/net/mac80211/offchannel.c
index a5379aea7d09..82baf5b6ecf4 100644
--- a/net/mac80211/offchannel.c
+++ b/net/mac80211/offchannel.c
@@ -102,8 +102,7 @@ static void ieee80211_offchannel_ps_disable(struct ieee80211_sub_if_data *sdata)
 	ieee80211_sta_reset_conn_monitor(sdata);
 }
 
-void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local,
-				    bool offchannel_ps_enable)
+void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local)
 {
 	struct ieee80211_sub_if_data *sdata;
 
@@ -126,16 +125,17 @@ void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local,
 			set_bit(SDATA_STATE_OFFCHANNEL, &sdata->state);
 
 		/* Check to see if we should disable beaconing. */
-		if (sdata->vif.type == NL80211_IFTYPE_AP ||
-		    sdata->vif.type == NL80211_IFTYPE_ADHOC ||
-		    sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
+		if (sdata->vif.bss_conf.enable_beacon) {
+			set_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
+				&sdata->state);
+			sdata->vif.bss_conf.enable_beacon = false;
 			ieee80211_bss_info_change_notify(
 				sdata, BSS_CHANGED_BEACON_ENABLED);
+		}
 
 		if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
 			netif_tx_stop_all_queues(sdata->dev);
-			if (offchannel_ps_enable &&
-			    (sdata->vif.type == NL80211_IFTYPE_STATION) &&
+			if (sdata->vif.type == NL80211_IFTYPE_STATION &&
 			    sdata->u.mgd.associated)
 				ieee80211_offchannel_ps_enable(sdata);
 		}
@@ -143,8 +143,7 @@ void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local,
 	mutex_unlock(&local->iflist_mtx);
 }
 
-void ieee80211_offchannel_return(struct ieee80211_local *local,
-				 bool offchannel_ps_disable)
+void ieee80211_offchannel_return(struct ieee80211_local *local)
 {
 	struct ieee80211_sub_if_data *sdata;
 
@@ -163,11 +162,9 @@ void ieee80211_offchannel_return(struct ieee80211_local *local,
 			continue;
 
 		/* Tell AP we're back */
-		if (offchannel_ps_disable &&
-		    sdata->vif.type == NL80211_IFTYPE_STATION) {
-			if (sdata->u.mgd.associated)
-				ieee80211_offchannel_ps_disable(sdata);
-		}
+		if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+		    sdata->u.mgd.associated)
+			ieee80211_offchannel_ps_disable(sdata);
 
 		if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
 			/*
@@ -183,11 +180,12 @@ void ieee80211_offchannel_return(struct ieee80211_local *local,
 			netif_tx_wake_all_queues(sdata->dev);
 		}
 
-		if (sdata->vif.type == NL80211_IFTYPE_AP ||
-		    sdata->vif.type == NL80211_IFTYPE_ADHOC ||
-		    sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
+		if (test_and_clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
+				       &sdata->state)) {
+			sdata->vif.bss_conf.enable_beacon = true;
 			ieee80211_bss_info_change_notify(
 				sdata, BSS_CHANGED_BEACON_ENABLED);
+		}
 	}
 	mutex_unlock(&local->iflist_mtx);
 }
@@ -385,7 +383,7 @@ void ieee80211_sw_roc_work(struct work_struct *work)
 			local->tmp_channel = NULL;
 			ieee80211_hw_config(local, 0);
 
-			ieee80211_offchannel_return(local, true);
+			ieee80211_offchannel_return(local);
 		}
 
 		ieee80211_recalc_idle(local);
diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c
index 79a48f37d409..e45b83610e85 100644
--- a/net/mac80211/pm.c
+++ b/net/mac80211/pm.c
@@ -7,25 +7,23 @@
 #include "led.h"
 
 /* return value indicates whether the driver should be further notified */
-static bool ieee80211_quiesce(struct ieee80211_sub_if_data *sdata)
+static void ieee80211_quiesce(struct ieee80211_sub_if_data *sdata)
 {
 	switch (sdata->vif.type) {
 	case NL80211_IFTYPE_STATION:
 		ieee80211_sta_quiesce(sdata);
-		return true;
+		break;
 	case NL80211_IFTYPE_ADHOC:
 		ieee80211_ibss_quiesce(sdata);
-		return true;
+		break;
 	case NL80211_IFTYPE_MESH_POINT:
 		ieee80211_mesh_quiesce(sdata);
-		return true;
-	case NL80211_IFTYPE_AP_VLAN:
-	case NL80211_IFTYPE_MONITOR:
-		/* don't tell driver about this */
-		return false;
+		break;
 	default:
-		return true;
+		break;
 	}
+
+	cancel_work_sync(&sdata->work);
 }
 
 int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
@@ -44,7 +42,8 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
 		mutex_lock(&local->sta_mtx);
 		list_for_each_entry(sta, &local->sta_list, list) {
 			set_sta_flag(sta, WLAN_STA_BLOCK_BA);
-			ieee80211_sta_tear_down_BA_sessions(sta, true);
+			ieee80211_sta_tear_down_BA_sessions(
+					sta, AGG_STOP_LOCAL_REQUEST);
 		}
 		mutex_unlock(&local->sta_mtx);
 	}
@@ -94,10 +93,9 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
 			WARN_ON(err != 1);
 			local->wowlan = false;
 		} else {
-			list_for_each_entry(sdata, &local->interfaces, list) {
-				cancel_work_sync(&sdata->work);
-				ieee80211_quiesce(sdata);
-			}
+			list_for_each_entry(sdata, &local->interfaces, list)
+				if (ieee80211_sdata_running(sdata))
+					ieee80211_quiesce(sdata);
 			goto suspend;
 		}
 	}
@@ -124,17 +122,43 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
 
 	/* remove all interfaces */
 	list_for_each_entry(sdata, &local->interfaces, list) {
-		cancel_work_sync(&sdata->work);
+		static u8 zero_addr[ETH_ALEN] = {};
+		u32 changed = 0;
 
-		if (!ieee80211_quiesce(sdata))
+		if (!ieee80211_sdata_running(sdata))
 			continue;
 
-		if (!ieee80211_sdata_running(sdata))
+		switch (sdata->vif.type) {
+		case NL80211_IFTYPE_AP_VLAN:
+		case NL80211_IFTYPE_MONITOR:
+			/* skip these */
 			continue;
+		case NL80211_IFTYPE_STATION:
+			if (sdata->vif.bss_conf.assoc)
+				changed = BSS_CHANGED_ASSOC |
+					  BSS_CHANGED_BSSID |
+					  BSS_CHANGED_IDLE;
+			break;
+		case NL80211_IFTYPE_AP:
+		case NL80211_IFTYPE_ADHOC:
+		case NL80211_IFTYPE_MESH_POINT:
+			if (sdata->vif.bss_conf.enable_beacon)
+				changed = BSS_CHANGED_BEACON_ENABLED;
+			break;
+		default:
+			break;
+		}
+
+		ieee80211_quiesce(sdata);
+
+		sdata->suspend_bss_conf = sdata->vif.bss_conf;
+		memset(&sdata->vif.bss_conf, 0, sizeof(sdata->vif.bss_conf));
+		sdata->vif.bss_conf.idle = true;
+		if (sdata->suspend_bss_conf.bssid)
+			sdata->vif.bss_conf.bssid = zero_addr;
 
-		/* disable beaconing */
-		ieee80211_bss_info_change_notify(sdata,
-			BSS_CHANGED_BEACON_ENABLED);
+		/* disable beaconing or remove association */
+		ieee80211_bss_info_change_notify(sdata, changed);
 
 		if (sdata->vif.type == NL80211_IFTYPE_AP &&
 		    rcu_access_pointer(sdata->u.ap.beacon))
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 580704eba8b8..a19089565c4b 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2353,7 +2353,7 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
 		    sdata->vif.type != NL80211_IFTYPE_ADHOC)
 			break;
 
-		/* verify action & smps_control are present */
+		/* verify action & smps_control/chanwidth are present */
 		if (len < IEEE80211_MIN_ACTION_SIZE + 2)
 			goto invalid;
 
@@ -2392,6 +2392,35 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
 						 IEEE80211_RC_SMPS_CHANGED);
 			goto handled;
 		}
+		case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
+			struct ieee80211_supported_band *sband;
+			u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth;
+			bool old_40mhz, new_40mhz;
+
+			/* If it doesn't support 40 MHz it can't change ... */
+			if (!rx->sta->supports_40mhz)
+				goto handled;
+
+			old_40mhz = rx->sta->sta.ht_cap.cap &
+					IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+			new_40mhz = chanwidth == IEEE80211_HT_CHANWIDTH_ANY;
+
+			if (old_40mhz == new_40mhz)
+				goto handled;
+
+			if (new_40mhz)
+				rx->sta->sta.ht_cap.cap |=
+					IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+			else
+				rx->sta->sta.ht_cap.cap &=
+					~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+
+			sband = rx->local->hw.wiphy->bands[status->band];
+
+			rate_control_rate_update(local, sband, rx->sta,
+						 IEEE80211_RC_BW_CHANGED);
+			goto handled;
+		}
 		default:
 			goto invalid;
 		}
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index d59fc6818b1c..607684c47d55 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -65,12 +65,11 @@ static bool is_uapsd_supported(struct ieee802_11_elems *elems)
 struct ieee80211_bss *
 ieee80211_bss_info_update(struct ieee80211_local *local,
 			  struct ieee80211_rx_status *rx_status,
-			  struct ieee80211_mgmt *mgmt,
-			  size_t len,
+			  struct ieee80211_mgmt *mgmt, size_t len,
 			  struct ieee802_11_elems *elems,
-			  struct ieee80211_channel *channel,
-			  bool beacon)
+			  struct ieee80211_channel *channel)
 {
+	bool beacon = ieee80211_is_beacon(mgmt->frame_control);
 	struct cfg80211_bss *cbss;
 	struct ieee80211_bss *bss;
 	int clen, srlen;
@@ -203,7 +202,7 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
 
 	bss = ieee80211_bss_info_update(local, rx_status,
 					mgmt, skb->len, &elems,
-					channel, beacon);
+					channel);
 	if (bss)
 		ieee80211_rx_bss_put(local, bss);
 }
@@ -292,7 +291,7 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted,
 	if (!was_hw_scan) {
 		ieee80211_configure_filter(local);
 		drv_sw_scan_complete(local);
-		ieee80211_offchannel_return(local, true);
+		ieee80211_offchannel_return(local);
 	}
 
 	ieee80211_recalc_idle(local);
@@ -341,7 +340,7 @@ static int ieee80211_start_sw_scan(struct ieee80211_local *local)
 	local->next_scan_state = SCAN_DECISION;
 	local->scan_channel_idx = 0;
 
-	ieee80211_offchannel_stop_vifs(local, true);
+	ieee80211_offchannel_stop_vifs(local);
 
 	ieee80211_configure_filter(local);
 
@@ -678,12 +677,8 @@ static void ieee80211_scan_state_suspend(struct ieee80211_local *local,
 	local->scan_channel = NULL;
 	ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
 
-	/*
-	 * Re-enable vifs and beaconing.  Leave PS
-	 * in off-channel state..will put that back
-	 * on-channel at the end of scanning.
-	 */
-	ieee80211_offchannel_return(local, false);
+	/* disable PS */
+	ieee80211_offchannel_return(local);
 
 	*next_delay = HZ / 5;
 	/* afterwards, resume scan & go to next channel */
@@ -693,8 +688,7 @@ static void ieee80211_scan_state_suspend(struct ieee80211_local *local,
 static void ieee80211_scan_state_resume(struct ieee80211_local *local,
 					unsigned long *next_delay)
 {
-	/* PS already is in off-channel mode */
-	ieee80211_offchannel_stop_vifs(local, false);
+	ieee80211_offchannel_stop_vifs(local);
 
 	if (local->ops->flush) {
 		drv_flush(local, false);
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index ca9fde198188..9d864ed5f3da 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -104,6 +104,16 @@ static void cleanup_single_sta(struct sta_info *sta)
 	 * neither mac80211 nor the driver can reference this
 	 * sta struct any more except by still existing timers
 	 * associated with this station that we clean up below.
+	 *
+	 * Note though that this still uses the sdata and even
+	 * calls the driver in AP and mesh mode, so interfaces
+	 * of those types mush use call sta_info_flush_cleanup()
+	 * (typically via sta_info_flush()) before deconfiguring
+	 * the driver.
+	 *
+	 * In station mode, nothing happens here so it doesn't
+	 * have to (and doesn't) do that, this is intentional to
+	 * speed up roaming.
 	 */
 
 	if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
@@ -774,7 +784,7 @@ int __must_check __sta_info_destroy(struct sta_info *sta)
 	 * will be sufficient.
 	 */
 	set_sta_flag(sta, WLAN_STA_BLOCK_BA);
-	ieee80211_sta_tear_down_BA_sessions(sta, false);
+	ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
 
 	ret = sta_info_hash_del(local, sta);
 	if (ret)
@@ -885,20 +895,12 @@ void sta_info_init(struct ieee80211_local *local)
 void sta_info_stop(struct ieee80211_local *local)
 {
 	del_timer_sync(&local->sta_cleanup);
-	sta_info_flush(local, NULL);
 }
 
-/**
- * sta_info_flush - flush matching STA entries from the STA table
- *
- * Returns the number of removed STA entries.
- *
- * @local: local interface data
- * @sdata: matching rule for the net device (sta->dev) or %NULL to match all STAs
- */
-int sta_info_flush(struct ieee80211_local *local,
-		   struct ieee80211_sub_if_data *sdata)
+
+int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata)
 {
+	struct ieee80211_local *local = sdata->local;
 	struct sta_info *sta, *tmp;
 	int ret = 0;
 
@@ -906,30 +908,22 @@ int sta_info_flush(struct ieee80211_local *local,
 
 	mutex_lock(&local->sta_mtx);
 	list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
-		if (!sdata || sdata == sta->sdata) {
+		if (sdata == sta->sdata) {
 			WARN_ON(__sta_info_destroy(sta));
 			ret++;
 		}
 	}
 	mutex_unlock(&local->sta_mtx);
 
-	rcu_barrier();
-
-	if (sdata) {
-		ieee80211_cleanup_sdata_stas(sdata);
-		cancel_work_sync(&sdata->cleanup_stations_wk);
-	} else {
-		mutex_lock(&local->iflist_mtx);
-		list_for_each_entry(sdata, &local->interfaces, list) {
-			ieee80211_cleanup_sdata_stas(sdata);
-			cancel_work_sync(&sdata->cleanup_stations_wk);
-		}
-		mutex_unlock(&local->iflist_mtx);
-	}
-
 	return ret;
 }
 
+void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata)
+{
+	ieee80211_cleanup_sdata_stas(sdata);
+	cancel_work_sync(&sdata->cleanup_stations_wk);
+}
+
 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
 			  unsigned long exp_time)
 {
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 37c1889afd3a..af7d78aa5523 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -92,6 +92,13 @@ enum ieee80211_sta_info_flags {
 #define HT_AGG_STATE_WANT_START		4
 #define HT_AGG_STATE_WANT_STOP		5
 
+enum ieee80211_agg_stop_reason {
+	AGG_STOP_DECLINED,
+	AGG_STOP_LOCAL_REQUEST,
+	AGG_STOP_PEER_REQUEST,
+	AGG_STOP_DESTROY_STA,
+};
+
 /**
  * struct tid_ampdu_tx - TID aggregation information (Tx).
  *
@@ -548,8 +555,39 @@ void sta_info_recalc_tim(struct sta_info *sta);
 
 void sta_info_init(struct ieee80211_local *local);
 void sta_info_stop(struct ieee80211_local *local);
-int sta_info_flush(struct ieee80211_local *local,
-		   struct ieee80211_sub_if_data *sdata);
+int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata);
+
+/**
+ * sta_info_flush_cleanup - flush the sta_info cleanup queue
+ * @sdata: the interface
+ *
+ * Flushes the sta_info cleanup queue for a given interface;
+ * this is necessary before the interface is removed or, for
+ * AP/mesh interfaces, before it is deconfigured.
+ *
+ * Note an rcu_barrier() must precede the function, after all
+ * stations have been flushed/removed to ensure the call_rcu()
+ * calls that add stations to the cleanup queue have completed.
+ */
+void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata);
+
+/**
+ * sta_info_flush - flush matching STA entries from the STA table
+ *
+ * Returns the number of removed STA entries.
+ *
+ * @sdata: sdata to remove all stations from
+ */
+static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
+{
+	int ret = sta_info_flush_defer(sdata);
+
+	rcu_barrier();
+	sta_info_flush_cleanup(sdata);
+
+	return ret;
+}
+
 void sta_set_rate_info_tx(struct sta_info *sta,
 			  const struct ieee80211_tx_rate *rate,
 			  struct rate_info *rinfo);
diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h
index a8270b441a6f..41861b91daa3 100644
--- a/net/mac80211/trace.h
+++ b/net/mac80211/trace.h
@@ -28,21 +28,27 @@
 #define VIF_PR_FMT	" vif:%s(%d%s)"
 #define VIF_PR_ARG	__get_str(vif_name), __entry->vif_type, __entry->p2p ? "/p2p" : ""
 
-#define CHANCTX_ENTRY	__field(u32, control_freq)				\
+#define CHANDEF_ENTRY	__field(u32, control_freq)				\
 			__field(u32, chan_width)				\
 			__field(u32, center_freq1)				\
-			__field(u32, center_freq2)				\
+			__field(u32, center_freq2)
+#define CHANDEF_ASSIGN(c)							\
+			__entry->control_freq = (c)->chan->center_freq;		\
+			__entry->chan_width = (c)->width;			\
+			__entry->center_freq1 = (c)->center_freq1;		\
+			__entry->center_freq1 = (c)->center_freq2;
+#define CHANDEF_PR_FMT	" control:%d MHz width:%d center: %d/%d MHz"
+#define CHANDEF_PR_ARG	__entry->control_freq, __entry->chan_width,		\
+			__entry->center_freq1, __entry->center_freq2
+
+#define CHANCTX_ENTRY	CHANDEF_ENTRY						\
 			__field(u8, rx_chains_static)				\
 			__field(u8, rx_chains_dynamic)
-#define CHANCTX_ASSIGN	__entry->control_freq = ctx->conf.def.chan->center_freq;\
-			__entry->chan_width = ctx->conf.def.width;		\
-			__entry->center_freq1 = ctx->conf.def.center_freq1;	\
-			__entry->center_freq2 = ctx->conf.def.center_freq2;	\
+#define CHANCTX_ASSIGN	CHANDEF_ASSIGN(&ctx->conf.def)				\
 			__entry->rx_chains_static = ctx->conf.rx_chains_static;	\
 			__entry->rx_chains_dynamic = ctx->conf.rx_chains_dynamic
-#define CHANCTX_PR_FMT	" control:%d MHz width:%d center: %d/%d MHz chains:%d/%d"
-#define CHANCTX_PR_ARG	__entry->control_freq, __entry->chan_width,		\
-			__entry->center_freq1, __entry->center_freq2,		\
+#define CHANCTX_PR_FMT	CHANDEF_PR_FMT " chains:%d/%d"
+#define CHANCTX_PR_ARG	CHANDEF_PR_ARG,						\
 			__entry->rx_chains_static, __entry->rx_chains_dynamic
 
 
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index e9eadc40c09c..f32d68186dbc 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1673,10 +1673,13 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
 			chanctx_conf =
 				rcu_dereference(tmp_sdata->vif.chanctx_conf);
 	}
-	if (!chanctx_conf)
-		goto fail_rcu;
 
-	chan = chanctx_conf->def.chan;
+	if (chanctx_conf)
+		chan = chanctx_conf->def.chan;
+	else if (!local->use_chanctx)
+		chan = local->_oper_channel;
+	else
+		goto fail_rcu;
 
 	/*
 	 * Frame injection is not allowed if beaconing is not allowed
@@ -2261,9 +2264,8 @@ void ieee80211_tx_pending(unsigned long data)
 
 /* functions for drivers to get certain frames */
 
-static void ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
-				     struct ps_data *ps,
-				     struct sk_buff *skb)
+static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
+				       struct ps_data *ps, struct sk_buff *skb)
 {
 	u8 *pos, *tim;
 	int aid0 = 0;
@@ -2325,6 +2327,31 @@ static void ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
 	}
 }
 
+static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
+				    struct ps_data *ps, struct sk_buff *skb)
+{
+	struct ieee80211_local *local = sdata->local;
+
+	/*
+	 * Not very nice, but we want to allow the driver to call
+	 * ieee80211_beacon_get() as a response to the set_tim()
+	 * callback. That, however, is already invoked under the
+	 * sta_lock to guarantee consistent and race-free update
+	 * of the tim bitmap in mac80211 and the driver.
+	 */
+	if (local->tim_in_locked_section) {
+		__ieee80211_beacon_add_tim(sdata, ps, skb);
+	} else {
+		unsigned long flags;
+
+		spin_lock_irqsave(&local->tim_lock, flags);
+		__ieee80211_beacon_add_tim(sdata, ps, skb);
+		spin_unlock_irqrestore(&local->tim_lock, flags);
+	}
+
+	return 0;
+}
+
 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
 					 struct ieee80211_vif *vif,
 					 u16 *tim_offset, u16 *tim_length)
@@ -2369,22 +2396,7 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
 			memcpy(skb_put(skb, beacon->head_len), beacon->head,
 			       beacon->head_len);
 
-			/*
-			 * Not very nice, but we want to allow the driver to call
-			 * ieee80211_beacon_get() as a response to the set_tim()
-			 * callback. That, however, is already invoked under the
-			 * sta_lock to guarantee consistent and race-free update
-			 * of the tim bitmap in mac80211 and the driver.
-			 */
-			if (local->tim_in_locked_section) {
-				ieee80211_beacon_add_tim(sdata, &ap->ps, skb);
-			} else {
-				unsigned long flags;
-
-				spin_lock_irqsave(&local->tim_lock, flags);
-				ieee80211_beacon_add_tim(sdata, &ap->ps, skb);
-				spin_unlock_irqrestore(&local->tim_lock, flags);
-			}
+			ieee80211_beacon_add_tim(sdata, &ap->ps, skb);
 
 			if (tim_offset)
 				*tim_offset = beacon->head_len;
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index f11e8c540db4..7519018ff71a 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1358,6 +1358,7 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 	struct ieee80211_chanctx *ctx;
 	struct sta_info *sta;
 	int res, i;
+	bool reconfig_due_to_wowlan = false;
 
 #ifdef CONFIG_PM
 	if (local->suspended)
@@ -1377,6 +1378,7 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 		 * res is 1, which means the driver requested
 		 * to go through a regular reset on wakeup.
 		 */
+		reconfig_due_to_wowlan = true;
 	}
 #endif
 	/* everything else happens only if HW was up & running */
@@ -1526,6 +1528,11 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 			  BSS_CHANGED_IDLE |
 			  BSS_CHANGED_TXPOWER;
 
+#ifdef CONFIG_PM
+		if (local->resuming && !reconfig_due_to_wowlan)
+			sdata->vif.bss_conf = sdata->suspend_bss_conf;
+#endif
+
 		switch (sdata->vif.type) {
 		case NL80211_IFTYPE_STATION:
 			changed |= BSS_CHANGED_ASSOC |
@@ -1550,9 +1557,11 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 
 			/* fall through */
 		case NL80211_IFTYPE_MESH_POINT:
-			changed |= BSS_CHANGED_BEACON |
-				   BSS_CHANGED_BEACON_ENABLED;
-			ieee80211_bss_info_change_notify(sdata, changed);
+			if (sdata->vif.bss_conf.enable_beacon) {
+				changed |= BSS_CHANGED_BEACON |
+					   BSS_CHANGED_BEACON_ENABLED;
+				ieee80211_bss_info_change_notify(sdata, changed);
+			}
 			break;
 		case NL80211_IFTYPE_WDS:
 			break;
@@ -1632,7 +1641,8 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 		mutex_lock(&local->sta_mtx);
 
 		list_for_each_entry(sta, &local->sta_list, list) {
-			ieee80211_sta_tear_down_BA_sessions(sta, true);
+			ieee80211_sta_tear_down_BA_sessions(
+					sta, AGG_STOP_LOCAL_REQUEST);
 			clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
 		}
 
@@ -1646,10 +1656,11 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 	 * If this is for hw restart things are still running.
 	 * We may want to change that later, however.
 	 */
-	if (!local->suspended) {
+	if (!local->suspended || reconfig_due_to_wowlan)
 		drv_restart_complete(local);
+
+	if (!local->suspended)
 		return 0;
-	}
 
 #ifdef CONFIG_PM
 	/* first set suspended false, then resuming */
@@ -1864,7 +1875,7 @@ u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
 }
 
 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
-							   u32 cap)
+			       u32 cap)
 {
 	__le32 tmp;
 
diff --git a/net/nfc/core.c b/net/nfc/core.c
index aa64ea441676..25522e56d350 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -338,7 +338,7 @@ int nfc_activate_target(struct nfc_dev *dev, u32 target_idx, u32 protocol)
 		dev->active_target = target;
 		dev->rf_mode = NFC_RF_INITIATOR;
 
-		if (dev->ops->check_presence)
+		if (dev->ops->check_presence && !dev->shutting_down)
 			mod_timer(&dev->check_pres_timer, jiffies +
 				  msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
 	}
@@ -429,7 +429,7 @@ int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb,
 		rc = dev->ops->im_transceive(dev, dev->active_target, skb, cb,
 					     cb_context);
 
-		if (!rc && dev->ops->check_presence)
+		if (!rc && dev->ops->check_presence && !dev->shutting_down)
 			mod_timer(&dev->check_pres_timer, jiffies +
 				  msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
 	} else if (dev->rf_mode == NFC_RF_TARGET && dev->ops->tm_send != NULL) {
@@ -684,11 +684,6 @@ static void nfc_release(struct device *d)
 
 	pr_debug("dev_name=%s\n", dev_name(&dev->dev));
 
-	if (dev->ops->check_presence) {
-		del_timer_sync(&dev->check_pres_timer);
-		cancel_work_sync(&dev->check_pres_work);
-	}
-
 	nfc_genl_data_exit(&dev->genl_data);
 	kfree(dev->targets);
 	kfree(dev);
@@ -706,15 +701,16 @@ static void nfc_check_pres_work(struct work_struct *work)
 		rc = dev->ops->check_presence(dev, dev->active_target);
 		if (rc == -EOPNOTSUPP)
 			goto exit;
-		if (!rc) {
-			mod_timer(&dev->check_pres_timer, jiffies +
-				  msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
-		} else {
+		if (rc) {
 			u32 active_target_idx = dev->active_target->idx;
 			device_unlock(&dev->dev);
 			nfc_target_lost(dev, active_target_idx);
 			return;
 		}
+
+		if (!dev->shutting_down)
+			mod_timer(&dev->check_pres_timer, jiffies +
+				  msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
 	}
 
 exit:
@@ -761,6 +757,7 @@ struct nfc_dev *nfc_get_device(unsigned int idx)
  */
 struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
 				    u32 supported_protocols,
+				    u32 supported_se,
 				    int tx_headroom, int tx_tailroom)
 {
 	struct nfc_dev *dev;
@@ -778,6 +775,8 @@ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
 
 	dev->ops = ops;
 	dev->supported_protocols = supported_protocols;
+	dev->supported_se = supported_se;
+	dev->active_se = NFC_SE_NONE;
 	dev->tx_headroom = tx_headroom;
 	dev->tx_tailroom = tx_tailroom;
 
@@ -853,26 +852,27 @@ void nfc_unregister_device(struct nfc_dev *dev)
 
 	id = dev->idx;
 
-	mutex_lock(&nfc_devlist_mutex);
-	nfc_devlist_generation++;
-
-	/* lock to avoid unregistering a device while an operation
-	   is in progress */
-	device_lock(&dev->dev);
-	device_del(&dev->dev);
-	device_unlock(&dev->dev);
+	if (dev->ops->check_presence) {
+		device_lock(&dev->dev);
+		dev->shutting_down = true;
+		device_unlock(&dev->dev);
+		del_timer_sync(&dev->check_pres_timer);
+		cancel_work_sync(&dev->check_pres_work);
+	}
 
-	mutex_unlock(&nfc_devlist_mutex);
+	rc = nfc_genl_device_removed(dev);
+	if (rc)
+		pr_debug("The userspace won't be notified that the device %s "
+			 "was removed\n", dev_name(&dev->dev));
 
 	nfc_llcp_unregister_device(dev);
 
-	rc = nfc_genl_device_removed(dev);
-	if (rc)
-		pr_debug("The userspace won't be notified that the device %s was removed\n",
-			 dev_name(&dev->dev));
+	mutex_lock(&nfc_devlist_mutex);
+	nfc_devlist_generation++;
+	device_del(&dev->dev);
+	mutex_unlock(&nfc_devlist_mutex);
 
 	ida_simple_remove(&nfc_index_ida, id);
-
 }
 EXPORT_SYMBOL(nfc_unregister_device);
 
diff --git a/net/nfc/hci/command.c b/net/nfc/hci/command.c
index 7d99410e6c1a..64f922be9281 100644
--- a/net/nfc/hci/command.c
+++ b/net/nfc/hci/command.c
@@ -280,14 +280,19 @@ static int nfc_hci_delete_pipe(struct nfc_hci_dev *hdev, u8 pipe)
 static int nfc_hci_clear_all_pipes(struct nfc_hci_dev *hdev)
 {
 	u8 param[2];
+	size_t param_len = 2;
 
 	/* TODO: Find out what the identity reference data is
 	 * and fill param with it. HCI spec 6.1.3.5 */
 
 	pr_debug("\n");
 
+	if (test_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &hdev->quirks))
+		param_len = 0;
+
 	return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
-				   NFC_HCI_ADM_CLEAR_ALL_PIPE, param, 2, NULL);
+				   NFC_HCI_ADM_CLEAR_ALL_PIPE, param, param_len,
+				   NULL);
 }
 
 int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate)
diff --git a/net/nfc/hci/core.c b/net/nfc/hci/core.c
index 7bea574d5934..91020b210d87 100644
--- a/net/nfc/hci/core.c
+++ b/net/nfc/hci/core.c
@@ -57,6 +57,8 @@ static void nfc_hci_msg_tx_work(struct work_struct *work)
 	int r = 0;
 
 	mutex_lock(&hdev->msg_tx_mutex);
+	if (hdev->shutting_down)
+		goto exit;
 
 	if (hdev->cmd_pending_msg) {
 		if (timer_pending(&hdev->cmd_timer) == 0) {
@@ -295,6 +297,12 @@ void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
 		goto exit;
 	}
 
+	if (hdev->ops->event_received) {
+		r = hdev->ops->event_received(hdev, gate, event, skb);
+		if (r <= 0)
+			goto exit_noskb;
+	}
+
 	switch (event) {
 	case NFC_HCI_EVT_TARGET_DISCOVERED:
 		if (skb->len < 1) {	/* no status data? */
@@ -320,17 +328,15 @@ void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
 		r = nfc_hci_target_discovered(hdev, gate);
 		break;
 	default:
-		if (hdev->ops->event_received) {
-			hdev->ops->event_received(hdev, gate, event, skb);
-			return;
-		}
-
+		pr_info("Discarded unknown event %x to gate %x\n", event, gate);
+		r = -EINVAL;
 		break;
 	}
 
 exit:
 	kfree_skb(skb);
 
+exit_noskb:
 	if (r) {
 		/* TODO: There was an error dispatching the event,
 		 * how to propagate up to nfc core?
@@ -669,8 +675,10 @@ static int hci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
 
 	if (hdev->ops->tm_send)
 		return hdev->ops->tm_send(hdev, skb);
-	else
-		return -ENOTSUPP;
+
+	kfree_skb(skb);
+
+	return -ENOTSUPP;
 }
 
 static int hci_check_presence(struct nfc_dev *nfc_dev,
@@ -787,7 +795,9 @@ static struct nfc_ops hci_nfc_ops = {
 
 struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
 					    struct nfc_hci_init_data *init_data,
+					    unsigned long quirks,
 					    u32 protocols,
+					    u32 supported_se,
 					    const char *llc_name,
 					    int tx_headroom,
 					    int tx_tailroom,
@@ -813,7 +823,7 @@ struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
 		return NULL;
 	}
 
-	hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols,
+	hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols, supported_se,
 					 tx_headroom + HCI_CMDS_HEADROOM,
 					 tx_tailroom);
 	if (!hdev->ndev) {
@@ -830,6 +840,8 @@ struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
 
 	memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
 
+	hdev->quirks = quirks;
+
 	return hdev;
 }
 EXPORT_SYMBOL(nfc_hci_allocate_device);
@@ -868,6 +880,28 @@ void nfc_hci_unregister_device(struct nfc_hci_dev *hdev)
 {
 	struct hci_msg *msg, *n;
 
+	mutex_lock(&hdev->msg_tx_mutex);
+
+	if (hdev->cmd_pending_msg) {
+		if (hdev->cmd_pending_msg->cb)
+			hdev->cmd_pending_msg->cb(
+					     hdev->cmd_pending_msg->cb_context,
+					     NULL, -ESHUTDOWN);
+		kfree(hdev->cmd_pending_msg);
+		hdev->cmd_pending_msg = NULL;
+	}
+
+	hdev->shutting_down = true;
+
+	mutex_unlock(&hdev->msg_tx_mutex);
+
+	del_timer_sync(&hdev->cmd_timer);
+	cancel_work_sync(&hdev->msg_tx_work);
+
+	cancel_work_sync(&hdev->msg_rx_work);
+
+	nfc_unregister_device(hdev->ndev);
+
 	skb_queue_purge(&hdev->rx_hcp_frags);
 	skb_queue_purge(&hdev->msg_rx_queue);
 
@@ -876,13 +910,6 @@ void nfc_hci_unregister_device(struct nfc_hci_dev *hdev)
 		skb_queue_purge(&msg->msg_frags);
 		kfree(msg);
 	}
-
-	del_timer_sync(&hdev->cmd_timer);
-
-	nfc_unregister_device(hdev->ndev);
-
-	cancel_work_sync(&hdev->msg_tx_work);
-	cancel_work_sync(&hdev->msg_rx_work);
 }
 EXPORT_SYMBOL(nfc_hci_unregister_device);
 
diff --git a/net/nfc/hci/hcp.c b/net/nfc/hci/hcp.c
index bc308a7ca609..b6b4109f2343 100644
--- a/net/nfc/hci/hcp.c
+++ b/net/nfc/hci/hcp.c
@@ -105,6 +105,13 @@ int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
 	}
 
 	mutex_lock(&hdev->msg_tx_mutex);
+
+	if (hdev->shutting_down) {
+		err = -ESHUTDOWN;
+		mutex_unlock(&hdev->msg_tx_mutex);
+		goto out_skb_err;
+	}
+
 	list_add_tail(&cmd->msg_l, &hdev->msg_tx_queue);
 	mutex_unlock(&hdev->msg_tx_mutex);
 
diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c
index df24be48d4da..c6bc3bd95052 100644
--- a/net/nfc/llcp/commands.c
+++ b/net/nfc/llcp/commands.c
@@ -304,6 +304,8 @@ int nfc_llcp_send_symm(struct nfc_dev *dev)
 
 	skb = llcp_add_header(skb, 0, 0, LLCP_PDU_SYMM);
 
+	__net_timestamp(skb);
+
 	nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_TX);
 
 	return nfc_data_exchange(dev, local->target_idx, skb,
diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index ec43914c92a9..85bc75c38dea 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -54,7 +54,6 @@ static void nfc_llcp_socket_purge(struct nfc_llcp_sock *sock)
 
 	skb_queue_purge(&sock->tx_queue);
 	skb_queue_purge(&sock->tx_pending_queue);
-	skb_queue_purge(&sock->tx_backlog_queue);
 
 	if (local == NULL)
 		return;
@@ -668,6 +667,8 @@ static void nfc_llcp_tx_work(struct work_struct *work)
 			if (ptype == LLCP_PDU_I)
 				copy_skb = skb_copy(skb, GFP_ATOMIC);
 
+			__net_timestamp(skb);
+
 			nfc_llcp_send_to_raw_sock(local, skb,
 						  NFC_LLCP_DIRECTION_TX);
 
@@ -781,9 +782,15 @@ static void nfc_llcp_recv_ui(struct nfc_llcp_local *local,
 
 	/* There is no sequence with UI frames */
 	skb_pull(skb, LLCP_HEADER_SIZE);
-	if (sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
-		pr_err("receive queue is full\n");
-		skb_queue_head(&llcp_sock->tx_backlog_queue, skb);
+	if (!sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
+		/*
+		 * UI frames will be freed from the socket layer, so we
+		 * need to keep them alive until someone receives them.
+		 */
+		skb_get(skb);
+	} else {
+		pr_err("Receive queue is full\n");
+		kfree_skb(skb);
 	}
 
 	nfc_llcp_sock_put(llcp_sock);
@@ -976,9 +983,15 @@ static void nfc_llcp_recv_hdlc(struct nfc_llcp_local *local,
 			pr_err("Received out of sequence I PDU\n");
 
 		skb_pull(skb, LLCP_HEADER_SIZE + LLCP_SEQUENCE_SIZE);
-		if (sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
-			pr_err("receive queue is full\n");
-			skb_queue_head(&llcp_sock->tx_backlog_queue, skb);
+		if (!sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
+			/*
+			 * I frames will be freed from the socket layer, so we
+			 * need to keep them alive until someone receives them.
+			 */
+			skb_get(skb);
+		} else {
+			pr_err("Receive queue is full\n");
+			kfree_skb(skb);
 		}
 	}
 
@@ -1245,6 +1258,8 @@ static void nfc_llcp_rx_work(struct work_struct *work)
 		print_hex_dump(KERN_DEBUG, "LLCP Rx: ", DUMP_PREFIX_OFFSET,
 			       16, 1, skb->data, skb->len, true);
 
+	__net_timestamp(skb);
+
 	nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_RX);
 
 	switch (ptype) {
@@ -1296,6 +1311,13 @@ static void nfc_llcp_rx_work(struct work_struct *work)
 	local->rx_pending = NULL;
 }
 
+static void __nfc_llcp_recv(struct nfc_llcp_local *local, struct sk_buff *skb)
+{
+	local->rx_pending = skb;
+	del_timer(&local->link_timer);
+	schedule_work(&local->rx_work);
+}
+
 void nfc_llcp_recv(void *data, struct sk_buff *skb, int err)
 {
 	struct nfc_llcp_local *local = (struct nfc_llcp_local *) data;
@@ -1306,9 +1328,7 @@ void nfc_llcp_recv(void *data, struct sk_buff *skb, int err)
 		return;
 	}
 
-	local->rx_pending = skb_get(skb);
-	del_timer(&local->link_timer);
-	schedule_work(&local->rx_work);
+	__nfc_llcp_recv(local, skb);
 }
 
 int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb)
@@ -1319,9 +1339,7 @@ int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb)
 	if (local == NULL)
 		return -ENODEV;
 
-	local->rx_pending = skb_get(skb);
-	del_timer(&local->link_timer);
-	schedule_work(&local->rx_work);
+	__nfc_llcp_recv(local, skb);
 
 	return 0;
 }
diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h
index 0d62366f8cc3..0eae5c509504 100644
--- a/net/nfc/llcp/llcp.h
+++ b/net/nfc/llcp/llcp.h
@@ -121,7 +121,6 @@ struct nfc_llcp_sock {
 
 	struct sk_buff_head tx_queue;
 	struct sk_buff_head tx_pending_queue;
-	struct sk_buff_head tx_backlog_queue;
 
 	struct list_head accept_queue;
 	struct sock *parent;
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index fea22eb41b82..5332751943a9 100644
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -672,25 +672,27 @@ static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 	copied = min_t(unsigned int, rlen, len);
 
 	cskb = skb;
-	if (memcpy_toiovec(msg->msg_iov, cskb->data, copied)) {
+	if (skb_copy_datagram_iovec(cskb, 0, msg->msg_iov, copied)) {
 		if (!(flags & MSG_PEEK))
 			skb_queue_head(&sk->sk_receive_queue, skb);
 		return -EFAULT;
 	}
 
+	sock_recv_timestamp(msg, sk, skb);
+
 	if (sk->sk_type == SOCK_DGRAM && msg->msg_name) {
 		struct nfc_llcp_ui_cb *ui_cb = nfc_llcp_ui_skb_cb(skb);
-		struct sockaddr_nfc_llcp sockaddr;
+		struct sockaddr_nfc_llcp *sockaddr =
+			(struct sockaddr_nfc_llcp *) msg->msg_name;
 
-		pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
+		msg->msg_namelen = sizeof(struct sockaddr_nfc_llcp);
 
-		sockaddr.sa_family = AF_NFC;
-		sockaddr.nfc_protocol = NFC_PROTO_NFC_DEP;
-		sockaddr.dsap = ui_cb->dsap;
-		sockaddr.ssap = ui_cb->ssap;
+		pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
 
-		memcpy(msg->msg_name, &sockaddr, sizeof(sockaddr));
-		msg->msg_namelen = sizeof(sockaddr);
+		sockaddr->sa_family = AF_NFC;
+		sockaddr->nfc_protocol = NFC_PROTO_NFC_DEP;
+		sockaddr->dsap = ui_cb->dsap;
+		sockaddr->ssap = ui_cb->ssap;
 	}
 
 	/* Mark read part of skb as used */
@@ -806,7 +808,6 @@ struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp)
 	llcp_sock->reserved_ssap = LLCP_SAP_MAX;
 	skb_queue_head_init(&llcp_sock->tx_queue);
 	skb_queue_head_init(&llcp_sock->tx_pending_queue);
-	skb_queue_head_init(&llcp_sock->tx_backlog_queue);
 	INIT_LIST_HEAD(&llcp_sock->accept_queue);
 
 	if (sock != NULL)
@@ -821,7 +822,6 @@ void nfc_llcp_sock_free(struct nfc_llcp_sock *sock)
 
 	skb_queue_purge(&sock->tx_queue);
 	skb_queue_purge(&sock->tx_pending_queue);
-	skb_queue_purge(&sock->tx_backlog_queue);
 
 	list_del_init(&sock->accept_queue);
 
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index 5f98dc1bf039..48ada0ec749e 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -658,6 +658,7 @@ static struct nfc_ops nci_nfc_ops = {
  */
 struct nci_dev *nci_allocate_device(struct nci_ops *ops,
 				    __u32 supported_protocols,
+				    __u32 supported_se,
 				    int tx_headroom, int tx_tailroom)
 {
 	struct nci_dev *ndev;
@@ -680,6 +681,7 @@ struct nci_dev *nci_allocate_device(struct nci_ops *ops,
 
 	ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops,
 					    supported_protocols,
+					    supported_se,
 					    tx_headroom + NCI_DATA_HDR_SIZE,
 					    tx_tailroom);
 	if (!ndev->nfc_dev)
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 3568ae16786d..504b883439f1 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -366,6 +366,7 @@ static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
 	if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
 	    nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
 	    nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
+	    nla_put_u32(msg, NFC_ATTR_SE, dev->supported_se) ||
 	    nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
 	    nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
 		goto nla_put_failure;
diff --git a/net/wireless/ap.c b/net/wireless/ap.c
index 324e8d851dc4..a4a14e8f55cc 100644
--- a/net/wireless/ap.c
+++ b/net/wireless/ap.c
@@ -46,3 +46,65 @@ int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 
 	return err;
 }
+
+void cfg80211_ch_switch_notify(struct net_device *dev,
+			       struct cfg80211_chan_def *chandef)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct wiphy *wiphy = wdev->wiphy;
+	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+
+	trace_cfg80211_ch_switch_notify(dev, chandef);
+
+	wdev_lock(wdev);
+
+	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
+		    wdev->iftype != NL80211_IFTYPE_P2P_GO))
+		goto out;
+
+	wdev->channel = chandef->chan;
+	nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
+out:
+	wdev_unlock(wdev);
+	return;
+}
+EXPORT_SYMBOL(cfg80211_ch_switch_notify);
+
+bool cfg80211_rx_spurious_frame(struct net_device *dev,
+				const u8 *addr, gfp_t gfp)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	bool ret;
+
+	trace_cfg80211_rx_spurious_frame(dev, addr);
+
+	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
+		    wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
+		trace_cfg80211_return_bool(false);
+		return false;
+	}
+	ret = nl80211_unexpected_frame(dev, addr, gfp);
+	trace_cfg80211_return_bool(ret);
+	return ret;
+}
+EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
+
+bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
+					const u8 *addr, gfp_t gfp)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	bool ret;
+
+	trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
+
+	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
+		    wdev->iftype != NL80211_IFTYPE_P2P_GO &&
+		    wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
+		trace_cfg80211_return_bool(false);
+		return false;
+	}
+	ret = nl80211_unexpected_4addr_frame(dev, addr, gfp);
+	trace_cfg80211_return_bool(ret);
+	return ret;
+}
+EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index a7990bb16529..396373f3ec26 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -76,6 +76,10 @@ bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef)
 			return false;
 		if (!chandef->center_freq2)
 			return false;
+		/* adjacent is not allowed -- that's a 160 MHz channel */
+		if (chandef->center_freq1 - chandef->center_freq2 == 80 ||
+		    chandef->center_freq2 - chandef->center_freq1 == 80)
+			return false;
 		break;
 	case NL80211_CHAN_WIDTH_80:
 		if (chandef->center_freq1 != control_freq + 30 &&
diff --git a/net/wireless/core.c b/net/wireless/core.c
index b677eab55b68..9245729694d2 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -57,9 +57,6 @@ struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
 {
 	struct cfg80211_registered_device *result = NULL, *rdev;
 
-	if (!wiphy_idx_valid(wiphy_idx))
-		return NULL;
-
 	assert_cfg80211_lock();
 
 	list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
@@ -74,10 +71,8 @@ struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
 
 int get_wiphy_idx(struct wiphy *wiphy)
 {
-	struct cfg80211_registered_device *rdev;
-	if (!wiphy)
-		return WIPHY_IDX_STALE;
-	rdev = wiphy_to_dev(wiphy);
+	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+
 	return rdev->wiphy_idx;
 }
 
@@ -86,9 +81,6 @@ struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
 {
 	struct cfg80211_registered_device *rdev;
 
-	if (!wiphy_idx_valid(wiphy_idx))
-		return NULL;
-
 	assert_cfg80211_lock();
 
 	rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
@@ -309,7 +301,7 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
 
 	rdev->wiphy_idx = wiphy_counter++;
 
-	if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
+	if (unlikely(rdev->wiphy_idx < 0)) {
 		wiphy_counter--;
 		mutex_unlock(&cfg80211_mutex);
 		/* ugh, wrapped! */
@@ -390,8 +382,11 @@ static int wiphy_verify_combinations(struct wiphy *wiphy)
 
 		c = &wiphy->iface_combinations[i];
 
-		/* Combinations with just one interface aren't real */
-		if (WARN_ON(c->max_interfaces < 2))
+		/*
+		 * Combinations with just one interface aren't real,
+		 * however we make an exception for DFS.
+		 */
+		if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
 			return -EINVAL;
 
 		/* Need at least one channel */
@@ -406,6 +401,11 @@ static int wiphy_verify_combinations(struct wiphy *wiphy)
 				CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
 			return -EINVAL;
 
+		/* DFS only works on one channel. */
+		if (WARN_ON(c->radar_detect_widths &&
+			    (c->num_different_channels > 1)))
+			return -EINVAL;
+
 		if (WARN_ON(!c->n_limits))
 			return -EINVAL;
 
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 3563097169cb..8396f7671c8d 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -18,6 +18,9 @@
 #include <net/cfg80211.h>
 #include "reg.h"
 
+
+#define WIPHY_IDX_INVALID	-1
+
 struct cfg80211_registered_device {
 	const struct cfg80211_ops *ops;
 	struct list_head list;
@@ -86,7 +89,7 @@ struct cfg80211_registered_device {
 
 	/* must be last because of the way we do wiphy_priv(),
 	 * and it should at least be aligned to NETDEV_ALIGN */
-	struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
+	struct wiphy wiphy __aligned(NETDEV_ALIGN);
 };
 
 static inline
@@ -96,13 +99,6 @@ struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
 	return container_of(wiphy, struct cfg80211_registered_device, wiphy);
 }
 
-/* Note 0 is valid, hence phy0 */
-static inline
-bool wiphy_idx_valid(int wiphy_idx)
-{
-	return wiphy_idx >= 0;
-}
-
 static inline void
 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 {
@@ -126,12 +122,6 @@ static inline void assert_cfg80211_lock(void)
 	lockdep_assert_held(&cfg80211_mutex);
 }
 
-/*
- * You can use this to mark a wiphy_idx as not having an associated wiphy.
- * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
- */
-#define WIPHY_IDX_STALE -1
-
 struct cfg80211_internal_bss {
 	struct list_head list;
 	struct rb_node rbn;
@@ -435,7 +425,8 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
 				 struct wireless_dev *wdev,
 				 enum nl80211_iftype iftype,
 				 struct ieee80211_channel *chan,
-				 enum cfg80211_chan_mode chanmode);
+				 enum cfg80211_chan_mode chanmode,
+				 u8 radar_detect);
 
 static inline int
 cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
@@ -443,7 +434,7 @@ cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
 			      enum nl80211_iftype iftype)
 {
 	return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
-					    CHAN_MODE_UNDEFINED);
+					    CHAN_MODE_UNDEFINED, 0);
 }
 
 static inline int
@@ -460,7 +451,7 @@ cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
 		      enum cfg80211_chan_mode chanmode)
 {
 	return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
-					    chan, chanmode);
+					    chan, chanmode, 0);
 }
 
 void
diff --git a/net/wireless/mesh.c b/net/wireless/mesh.c
index f9d6ce5cfabb..55957a284f6c 100644
--- a/net/wireless/mesh.c
+++ b/net/wireless/mesh.c
@@ -44,6 +44,10 @@
 
 #define MESH_SYNC_NEIGHBOR_OFFSET_MAX 50
 
+#define MESH_DEFAULT_BEACON_INTERVAL	1000	/* in 1024 us units (=TUs) */
+#define MESH_DEFAULT_DTIM_PERIOD	2
+#define MESH_DEFAULT_AWAKE_WINDOW	10	/* in 1024 us units (=TUs) */
+
 const struct mesh_config default_mesh_config = {
 	.dot11MeshRetryTimeout = MESH_RET_T,
 	.dot11MeshConfirmTimeout = MESH_CONF_T,
@@ -69,6 +73,8 @@ const struct mesh_config default_mesh_config = {
 	.dot11MeshHWMPactivePathToRootTimeout = MESH_PATH_TO_ROOT_TIMEOUT,
 	.dot11MeshHWMProotInterval = MESH_ROOT_INTERVAL,
 	.dot11MeshHWMPconfirmationInterval = MESH_ROOT_CONFIRMATION_INTERVAL,
+	.power_mode = NL80211_MESH_POWER_ACTIVE,
+	.dot11MeshAwakeWindowDuration = MESH_DEFAULT_AWAKE_WINDOW,
 };
 
 const struct mesh_setup default_mesh_setup = {
@@ -79,6 +85,8 @@ const struct mesh_setup default_mesh_setup = {
 	.ie = NULL,
 	.ie_len = 0,
 	.is_secure = false,
+	.beacon_interval = MESH_DEFAULT_BEACON_INTERVAL,
+	.dtim_period = MESH_DEFAULT_DTIM_PERIOD,
 };
 
 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index 5e8123ee63fd..461e692cdfec 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -987,65 +987,3 @@ void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
 	nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
 }
 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
-
-void cfg80211_ch_switch_notify(struct net_device *dev,
-			       struct cfg80211_chan_def *chandef)
-{
-	struct wireless_dev *wdev = dev->ieee80211_ptr;
-	struct wiphy *wiphy = wdev->wiphy;
-	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
-
-	trace_cfg80211_ch_switch_notify(dev, chandef);
-
-	wdev_lock(wdev);
-
-	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
-		    wdev->iftype != NL80211_IFTYPE_P2P_GO))
-		goto out;
-
-	wdev->channel = chandef->chan;
-	nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
-out:
-	wdev_unlock(wdev);
-	return;
-}
-EXPORT_SYMBOL(cfg80211_ch_switch_notify);
-
-bool cfg80211_rx_spurious_frame(struct net_device *dev,
-				const u8 *addr, gfp_t gfp)
-{
-	struct wireless_dev *wdev = dev->ieee80211_ptr;
-	bool ret;
-
-	trace_cfg80211_rx_spurious_frame(dev, addr);
-
-	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
-		    wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
-		trace_cfg80211_return_bool(false);
-		return false;
-	}
-	ret = nl80211_unexpected_frame(dev, addr, gfp);
-	trace_cfg80211_return_bool(ret);
-	return ret;
-}
-EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
-
-bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
-					const u8 *addr, gfp_t gfp)
-{
-	struct wireless_dev *wdev = dev->ieee80211_ptr;
-	bool ret;
-
-	trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
-
-	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
-		    wdev->iftype != NL80211_IFTYPE_P2P_GO &&
-		    wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
-		trace_cfg80211_return_bool(false);
-		return false;
-	}
-	ret = nl80211_unexpected_4addr_frame(dev, addr, gfp);
-	trace_cfg80211_return_bool(ret);
-	return ret;
-}
-EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index f45706adaf34..33de80364c5c 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -856,6 +856,9 @@ static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 		    nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 				c->max_interfaces))
 			goto nla_put_failure;
+		if (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
+				c->radar_detect_widths))
+			goto nla_put_failure;
 
 		nla_nest_end(msg, nl_combi);
 	}
@@ -2079,6 +2082,13 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
 	    !(rdev->wiphy.interface_modes & (1 << type)))
 		return -EOPNOTSUPP;
 
+	if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
+		nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
+			   ETH_ALEN);
+		if (!is_valid_ether_addr(params.macaddr))
+			return -EADDRNOTAVAIL;
+	}
+
 	if (info->attrs[NL80211_ATTR_4ADDR]) {
 		params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
 		err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
@@ -3001,6 +3011,18 @@ static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
 	    nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
 			sinfo->beacon_loss_count))
 		goto nla_put_failure;
+	if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
+	    nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
+			sinfo->local_pm))
+		goto nla_put_failure;
+	if ((sinfo->filled & STATION_INFO_PEER_PM) &&
+	    nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
+			sinfo->peer_pm))
+		goto nla_put_failure;
+	if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
+	    nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
+			sinfo->nonpeer_pm))
+		goto nla_put_failure;
 	if (sinfo->filled & STATION_INFO_BSS_PARAM) {
 		bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
 		if (!bss_param)
@@ -3188,13 +3210,9 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
 			nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
 	}
 
-	if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
-		params.listen_interval =
-		    nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
-
-	if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
-		params.ht_capa =
-			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
+	if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL] ||
+	    info->attrs[NL80211_ATTR_HT_CAPABILITY])
+		return -EINVAL;
 
 	if (!rdev->ops->change_station)
 		return -EOPNOTSUPP;
@@ -3210,6 +3228,17 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
 		params.plink_state =
 		    nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
 
+	if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
+		enum nl80211_mesh_power_mode pm = nla_get_u32(
+			info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
+
+		if (pm <= NL80211_MESH_POWER_UNKNOWN ||
+		    pm > NL80211_MESH_POWER_MAX)
+			return -EINVAL;
+
+		params.local_pm = pm;
+	}
+
 	switch (dev->ieee80211_ptr->iftype) {
 	case NL80211_IFTYPE_AP:
 	case NL80211_IFTYPE_AP_VLAN:
@@ -3217,6 +3246,8 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
 		/* disallow mesh-specific things */
 		if (params.plink_action)
 			return -EINVAL;
+		if (params.local_pm)
+			return -EINVAL;
 
 		/* TDLS can't be set, ... */
 		if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
@@ -3231,11 +3262,25 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
 		/* accept only the listed bits */
 		if (params.sta_flags_mask &
 				~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
+				  BIT(NL80211_STA_FLAG_AUTHENTICATED) |
+				  BIT(NL80211_STA_FLAG_ASSOCIATED) |
 				  BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
 				  BIT(NL80211_STA_FLAG_WME) |
 				  BIT(NL80211_STA_FLAG_MFP)))
 			return -EINVAL;
 
+		/* but authenticated/associated only if driver handles it */
+		if (!(rdev->wiphy.features &
+				NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
+		    params.sta_flags_mask &
+				(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
+				 BIT(NL80211_STA_FLAG_ASSOCIATED)))
+			return -EINVAL;
+
+		/* reject other things that can't change */
+		if (params.supported_rates)
+			return -EINVAL;
+
 		/* must be last in here for error handling */
 		params.vlan = get_vlan(info, rdev);
 		if (IS_ERR(params.vlan))
@@ -3255,9 +3300,7 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
 		/* disallow things sta doesn't support */
 		if (params.plink_action)
 			return -EINVAL;
-		if (params.ht_capa)
-			return -EINVAL;
-		if (params.listen_interval >= 0)
+		if (params.local_pm)
 			return -EINVAL;
 		/* reject any changes other than AUTHORIZED */
 		if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
@@ -3267,9 +3310,7 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
 		/* disallow things mesh doesn't support */
 		if (params.vlan)
 			return -EINVAL;
-		if (params.ht_capa)
-			return -EINVAL;
-		if (params.listen_interval >= 0)
+		if (params.supported_rates)
 			return -EINVAL;
 		/*
 		 * No special handling for TDLS here -- the userspace
@@ -3393,17 +3434,31 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
 		/* but don't bother the driver with it */
 		params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
 
+		/* allow authenticated/associated only if driver handles it */
+		if (!(rdev->wiphy.features &
+				NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
+		    params.sta_flags_mask &
+				(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
+				 BIT(NL80211_STA_FLAG_ASSOCIATED)))
+			return -EINVAL;
+
 		/* must be last in here for error handling */
 		params.vlan = get_vlan(info, rdev);
 		if (IS_ERR(params.vlan))
 			return PTR_ERR(params.vlan);
 		break;
 	case NL80211_IFTYPE_MESH_POINT:
+		/* associated is disallowed */
+		if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
+			return -EINVAL;
 		/* TDLS peers cannot be added */
 		if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
 			return -EINVAL;
 		break;
 	case NL80211_IFTYPE_STATION:
+		/* associated is disallowed */
+		if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
+			return -EINVAL;
 		/* Only TDLS peers can be added */
 		if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
 			return -EINVAL;
@@ -3787,12 +3842,8 @@ static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
 	 * window between nl80211_init() and regulatory_init(), if that is
 	 * even possible.
 	 */
-	mutex_lock(&cfg80211_mutex);
-	if (unlikely(!cfg80211_regdomain)) {
-		mutex_unlock(&cfg80211_mutex);
+	if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
 		return -EINPROGRESS;
-	}
-	mutex_unlock(&cfg80211_mutex);
 
 	if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
 		return -EINVAL;
@@ -3908,7 +3959,11 @@ static int nl80211_get_mesh_config(struct sk_buff *skb,
 	    nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
 			cur_params.dot11MeshHWMProotInterval) ||
 	    nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
-			cur_params.dot11MeshHWMPconfirmationInterval))
+			cur_params.dot11MeshHWMPconfirmationInterval) ||
+	    nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
+			cur_params.power_mode) ||
+	    nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
+			cur_params.dot11MeshAwakeWindowDuration))
 		goto nla_put_failure;
 	nla_nest_end(msg, pinfoattr);
 	genlmsg_end(msg, hdr);
@@ -3947,6 +4002,8 @@ static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_A
 	[NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
 	[NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
 	[NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
+	[NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
+	[NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
 };
 
 static const struct nla_policy
@@ -3967,13 +4024,15 @@ static int nl80211_parse_mesh_config(struct genl_info *info,
 	struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
 	u32 mask = 0;
 
-#define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
-do {\
-	if (table[attr_num]) {\
-		cfg->param = nla_fn(table[attr_num]); \
-		mask |= (1 << (attr_num - 1)); \
-	} \
-} while (0);\
+#define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
+do {									    \
+	if (tb[attr]) {							    \
+		if (fn(tb[attr]) < min || fn(tb[attr]) > max)		    \
+			return -EINVAL;					    \
+		cfg->param = fn(tb[attr]);				    \
+		mask |= (1 << (attr - 1));				    \
+	}								    \
+} while (0)
 
 
 	if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
@@ -3988,83 +4047,98 @@ do {\
 	BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
 
 	/* Fill in the params struct */
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
 				  mask, NL80211_MESHCONF_RETRY_TIMEOUT,
 				  nla_get_u16);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
 				  mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
 				  nla_get_u16);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
 				  mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
 				  nla_get_u16);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
 				  mask, NL80211_MESHCONF_MAX_PEER_LINKS,
 				  nla_get_u16);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
 				  mask, NL80211_MESHCONF_MAX_RETRIES,
 				  nla_get_u8);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
 				  mask, NL80211_MESHCONF_TTL, nla_get_u8);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
 				  mask, NL80211_MESHCONF_ELEMENT_TTL,
 				  nla_get_u8);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
 				  mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
 				  nla_get_u8);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
+				  1, 255, mask,
 				  NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
 				  nla_get_u32);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
 				  mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
 				  nla_get_u8);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
 				  mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
 				  nla_get_u32);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
 				  mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
 				  nla_get_u16);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
+				  1, 65535, mask,
 				  NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
 				  nla_get_u32);
 	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
-				  mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
+				  1, 65535, mask,
+				  NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
 				  nla_get_u16);
 	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
-				  mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
+				  1, 65535, mask,
+				  NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
 				  nla_get_u16);
 	FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
-				  dot11MeshHWMPnetDiameterTraversalTime, mask,
+				  dot11MeshHWMPnetDiameterTraversalTime,
+				  1, 65535, mask,
 				  NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
 				  nla_get_u16);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
-				  NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
-				  NL80211_MESHCONF_HWMP_RANN_INTERVAL,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
+				  mask, NL80211_MESHCONF_HWMP_ROOTMODE,
+				  nla_get_u8);
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
+				  mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
 				  nla_get_u16);
 	FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
-				  dot11MeshGateAnnouncementProtocol, mask,
-				  NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
+				  dot11MeshGateAnnouncementProtocol, 0, 1,
+				  mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
 				  nla_get_u8);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
 				  mask, NL80211_MESHCONF_FORWARDING,
 				  nla_get_u8);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
 				  mask, NL80211_MESHCONF_RSSI_THRESHOLD,
 				  nla_get_u32);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
 				  mask, NL80211_MESHCONF_HT_OPMODE,
 				  nla_get_u16);
 	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
-				  mask,
+				  1, 65535, mask,
 				  NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
 				  nla_get_u32);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
 				  mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
 				  nla_get_u16);
 	FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
-				  dot11MeshHWMPconfirmationInterval, mask,
+				  dot11MeshHWMPconfirmationInterval,
+				  1, 65535, mask,
 				  NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
 				  nla_get_u16);
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
+				  NL80211_MESH_POWER_ACTIVE,
+				  NL80211_MESH_POWER_MAX,
+				  mask, NL80211_MESHCONF_POWER_MODE,
+				  nla_get_u32);
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
+				  0, 65535, mask,
+				  NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
 	if (mask_out)
 		*mask_out = mask;
 
@@ -4152,6 +4226,7 @@ static int nl80211_update_mesh_config(struct sk_buff *skb,
 
 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
 {
+	const struct ieee80211_regdomain *regdom;
 	struct sk_buff *msg;
 	void *hdr = NULL;
 	struct nlattr *nl_reg_rules;
@@ -4174,35 +4249,36 @@ static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
 	if (!hdr)
 		goto put_failure;
 
-	if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
-			   cfg80211_regdomain->alpha2) ||
-	    (cfg80211_regdomain->dfs_region &&
-	     nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
-			cfg80211_regdomain->dfs_region)))
-		goto nla_put_failure;
-
 	if (reg_last_request_cell_base() &&
 	    nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
 			NL80211_USER_REG_HINT_CELL_BASE))
 		goto nla_put_failure;
 
+	rcu_read_lock();
+	regdom = rcu_dereference(cfg80211_regdomain);
+
+	if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
+	    (regdom->dfs_region &&
+	     nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
+		goto nla_put_failure_rcu;
+
 	nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
 	if (!nl_reg_rules)
-		goto nla_put_failure;
+		goto nla_put_failure_rcu;
 
-	for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
+	for (i = 0; i < regdom->n_reg_rules; i++) {
 		struct nlattr *nl_reg_rule;
 		const struct ieee80211_reg_rule *reg_rule;
 		const struct ieee80211_freq_range *freq_range;
 		const struct ieee80211_power_rule *power_rule;
 
-		reg_rule = &cfg80211_regdomain->reg_rules[i];
+		reg_rule = &regdom->reg_rules[i];
 		freq_range = &reg_rule->freq_range;
 		power_rule = &reg_rule->power_rule;
 
 		nl_reg_rule = nla_nest_start(msg, i);
 		if (!nl_reg_rule)
-			goto nla_put_failure;
+			goto nla_put_failure_rcu;
 
 		if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
 				reg_rule->flags) ||
@@ -4216,10 +4292,11 @@ static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
 				power_rule->max_antenna_gain) ||
 		    nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
 				power_rule->max_eirp))
-			goto nla_put_failure;
+			goto nla_put_failure_rcu;
 
 		nla_nest_end(msg, nl_reg_rule);
 	}
+	rcu_read_unlock();
 
 	nla_nest_end(msg, nl_reg_rules);
 
@@ -4227,6 +4304,8 @@ static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
 	err = genlmsg_reply(msg, info);
 	goto out;
 
+nla_put_failure_rcu:
+	rcu_read_unlock();
 nla_put_failure:
 	genlmsg_cancel(msg, hdr);
 put_failure:
@@ -4259,27 +4338,18 @@ static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
 		dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
 
 	nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
-			rem_reg_rules) {
+			    rem_reg_rules) {
 		num_rules++;
 		if (num_rules > NL80211_MAX_SUPP_REG_RULES)
 			return -EINVAL;
 	}
 
-	mutex_lock(&cfg80211_mutex);
-
-	if (!reg_is_valid_request(alpha2)) {
-		r = -EINVAL;
-		goto bad_reg;
-	}
-
 	size_of_regd = sizeof(struct ieee80211_regdomain) +
-		(num_rules * sizeof(struct ieee80211_reg_rule));
+		       num_rules * sizeof(struct ieee80211_reg_rule);
 
 	rd = kzalloc(size_of_regd, GFP_KERNEL);
-	if (!rd) {
-		r = -ENOMEM;
-		goto bad_reg;
-	}
+	if (!rd)
+		return -ENOMEM;
 
 	rd->n_reg_rules = num_rules;
 	rd->alpha2[0] = alpha2[0];
@@ -4293,10 +4363,10 @@ static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
 		rd->dfs_region = dfs_region;
 
 	nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
-			rem_reg_rules) {
+			    rem_reg_rules) {
 		nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
-			nla_data(nl_reg_rule), nla_len(nl_reg_rule),
-			reg_rule_policy);
+			  nla_data(nl_reg_rule), nla_len(nl_reg_rule),
+			  reg_rule_policy);
 		r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
 		if (r)
 			goto bad_reg;
@@ -4309,16 +4379,14 @@ static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
 		}
 	}
 
-	BUG_ON(rule_idx != num_rules);
+	mutex_lock(&cfg80211_mutex);
 
 	r = set_regdom(rd);
-
+	/* set_regdom took ownership */
+	rd = NULL;
 	mutex_unlock(&cfg80211_mutex);
 
-	return r;
-
  bad_reg:
-	mutex_unlock(&cfg80211_mutex);
 	kfree(rd);
 	return r;
 }
@@ -5867,6 +5935,15 @@ static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
 		connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
 	}
 
+	if (info->attrs[NL80211_ATTR_USE_MFP]) {
+		connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
+		if (connect.mfp != NL80211_MFP_REQUIRED &&
+		    connect.mfp != NL80211_MFP_NO)
+			return -EINVAL;
+	} else {
+		connect.mfp = NL80211_MFP_NO;
+	}
+
 	if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 		connect.channel =
 			ieee80211_get_channel(wiphy,
@@ -6652,6 +6729,21 @@ static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
 			    nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
 			return -EINVAL;
 
+	if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
+		setup.beacon_interval =
+			nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
+		if (setup.beacon_interval < 10 ||
+		    setup.beacon_interval > 10000)
+			return -EINVAL;
+	}
+
+	if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
+		setup.dtim_period =
+			nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
+		if (setup.dtim_period < 1 || setup.dtim_period > 100)
+			return -EINVAL;
+	}
+
 	if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
 		/* parse additional setup parameters if given */
 		err = nl80211_parse_mesh_setup(info, &setup);
@@ -8051,7 +8143,7 @@ void nl80211_send_reg_change_event(struct regulatory_request *request)
 			goto nla_put_failure;
 	}
 
-	if (wiphy_idx_valid(request->wiphy_idx) &&
+	if (request->wiphy_idx != WIPHY_IDX_INVALID &&
 	    nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
 		goto nla_put_failure;
 
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 82c4fc7c994c..de02d633c212 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -48,7 +48,6 @@
 #include <linux/export.h>
 #include <linux/slab.h>
 #include <linux/list.h>
-#include <linux/random.h>
 #include <linux/ctype.h>
 #include <linux/nl80211.h>
 #include <linux/platform_device.h>
@@ -66,6 +65,13 @@
 #define REG_DBG_PRINT(args...)
 #endif
 
+enum reg_request_treatment {
+	REG_REQ_OK,
+	REG_REQ_IGNORE,
+	REG_REQ_INTERSECT,
+	REG_REQ_ALREADY_SET,
+};
+
 static struct regulatory_request core_request_world = {
 	.initiator = NL80211_REGDOM_SET_BY_CORE,
 	.alpha2[0] = '0',
@@ -76,7 +82,8 @@ static struct regulatory_request core_request_world = {
 };
 
 /* Receipt of information from last regulatory request */
-static struct regulatory_request *last_request = &core_request_world;
+static struct regulatory_request __rcu *last_request =
+	(void __rcu *)&core_request_world;
 
 /* To trigger userspace events */
 static struct platform_device *reg_pdev;
@@ -88,16 +95,16 @@ static struct device_type reg_device_type = {
 /*
  * Central wireless core regulatory domains, we only need two,
  * the current one and a world regulatory domain in case we have no
- * information to give us an alpha2
+ * information to give us an alpha2.
  */
-const struct ieee80211_regdomain *cfg80211_regdomain;
+const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
 
 /*
  * Protects static reg.c components:
- *     - cfg80211_world_regdom
- *     - cfg80211_regdom
- *     - last_request
- *     - reg_num_devs_support_basehint
+ *	- cfg80211_regdomain (if not used with RCU)
+ *	- cfg80211_world_regdom
+ *	- last_request (if not used with RCU)
+ *	- reg_num_devs_support_basehint
  */
 static DEFINE_MUTEX(reg_mutex);
 
@@ -112,6 +119,31 @@ static inline void assert_reg_lock(void)
 	lockdep_assert_held(&reg_mutex);
 }
 
+static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
+{
+	return rcu_dereference_protected(cfg80211_regdomain,
+					 lockdep_is_held(&reg_mutex));
+}
+
+static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
+{
+	return rcu_dereference_protected(wiphy->regd,
+					 lockdep_is_held(&reg_mutex));
+}
+
+static void rcu_free_regdom(const struct ieee80211_regdomain *r)
+{
+	if (!r)
+		return;
+	kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
+}
+
+static struct regulatory_request *get_last_request(void)
+{
+	return rcu_dereference_check(last_request,
+				     lockdep_is_held(&reg_mutex));
+}
+
 /* Used to queue up regulatory hints */
 static LIST_HEAD(reg_requests_list);
 static spinlock_t reg_requests_lock;
@@ -177,28 +209,37 @@ static char user_alpha2[2];
 module_param(ieee80211_regdom, charp, 0444);
 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
 
-static void reset_regdomains(bool full_reset)
+static void reset_regdomains(bool full_reset,
+			     const struct ieee80211_regdomain *new_regdom)
 {
+	const struct ieee80211_regdomain *r;
+	struct regulatory_request *lr;
+
+	assert_reg_lock();
+
+	r = get_cfg80211_regdom();
+
 	/* avoid freeing static information or freeing something twice */
-	if (cfg80211_regdomain == cfg80211_world_regdom)
-		cfg80211_regdomain = NULL;
+	if (r == cfg80211_world_regdom)
+		r = NULL;
 	if (cfg80211_world_regdom == &world_regdom)
 		cfg80211_world_regdom = NULL;
-	if (cfg80211_regdomain == &world_regdom)
-		cfg80211_regdomain = NULL;
+	if (r == &world_regdom)
+		r = NULL;
 
-	kfree(cfg80211_regdomain);
-	kfree(cfg80211_world_regdom);
+	rcu_free_regdom(r);
+	rcu_free_regdom(cfg80211_world_regdom);
 
 	cfg80211_world_regdom = &world_regdom;
-	cfg80211_regdomain = NULL;
+	rcu_assign_pointer(cfg80211_regdomain, new_regdom);
 
 	if (!full_reset)
 		return;
 
-	if (last_request != &core_request_world)
-		kfree(last_request);
-	last_request = &core_request_world;
+	lr = get_last_request();
+	if (lr != &core_request_world && lr)
+		kfree_rcu(lr, rcu_head);
+	rcu_assign_pointer(last_request, &core_request_world);
 }
 
 /*
@@ -207,30 +248,29 @@ static void reset_regdomains(bool full_reset)
  */
 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
 {
-	BUG_ON(!last_request);
+	struct regulatory_request *lr;
+
+	lr = get_last_request();
+
+	WARN_ON(!lr);
 
-	reset_regdomains(false);
+	reset_regdomains(false, rd);
 
 	cfg80211_world_regdom = rd;
-	cfg80211_regdomain = rd;
 }
 
 bool is_world_regdom(const char *alpha2)
 {
 	if (!alpha2)
 		return false;
-	if (alpha2[0] == '0' && alpha2[1] == '0')
-		return true;
-	return false;
+	return alpha2[0] == '0' && alpha2[1] == '0';
 }
 
 static bool is_alpha2_set(const char *alpha2)
 {
 	if (!alpha2)
 		return false;
-	if (alpha2[0] != 0 && alpha2[1] != 0)
-		return true;
-	return false;
+	return alpha2[0] && alpha2[1];
 }
 
 static bool is_unknown_alpha2(const char *alpha2)
@@ -241,9 +281,7 @@ static bool is_unknown_alpha2(const char *alpha2)
 	 * Special case where regulatory domain was built by driver
 	 * but a specific alpha2 cannot be determined
 	 */
-	if (alpha2[0] == '9' && alpha2[1] == '9')
-		return true;
-	return false;
+	return alpha2[0] == '9' && alpha2[1] == '9';
 }
 
 static bool is_intersected_alpha2(const char *alpha2)
@@ -255,39 +293,30 @@ static bool is_intersected_alpha2(const char *alpha2)
 	 * result of an intersection between two regulatory domain
 	 * structures
 	 */
-	if (alpha2[0] == '9' && alpha2[1] == '8')
-		return true;
-	return false;
+	return alpha2[0] == '9' && alpha2[1] == '8';
 }
 
 static bool is_an_alpha2(const char *alpha2)
 {
 	if (!alpha2)
 		return false;
-	if (isalpha(alpha2[0]) && isalpha(alpha2[1]))
-		return true;
-	return false;
+	return isalpha(alpha2[0]) && isalpha(alpha2[1]);
 }
 
 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
 {
 	if (!alpha2_x || !alpha2_y)
 		return false;
-	if (alpha2_x[0] == alpha2_y[0] &&
-		alpha2_x[1] == alpha2_y[1])
-		return true;
-	return false;
+	return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
 }
 
 static bool regdom_changes(const char *alpha2)
 {
-	assert_cfg80211_lock();
+	const struct ieee80211_regdomain *r = get_cfg80211_regdom();
 
-	if (!cfg80211_regdomain)
+	if (!r)
 		return true;
-	if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
-		return false;
-	return true;
+	return !alpha2_equal(r->alpha2, alpha2);
 }
 
 /*
@@ -301,38 +330,36 @@ static bool is_user_regdom_saved(void)
 		return false;
 
 	/* This would indicate a mistake on the design */
-	if (WARN((!is_world_regdom(user_alpha2) &&
-		  !is_an_alpha2(user_alpha2)),
+	if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
 		 "Unexpected user alpha2: %c%c\n",
-		 user_alpha2[0],
-	         user_alpha2[1]))
+		 user_alpha2[0], user_alpha2[1]))
 		return false;
 
 	return true;
 }
 
-static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd,
-			 const struct ieee80211_regdomain *src_regd)
+static const struct ieee80211_regdomain *
+reg_copy_regd(const struct ieee80211_regdomain *src_regd)
 {
 	struct ieee80211_regdomain *regd;
-	int size_of_regd = 0;
+	int size_of_regd;
 	unsigned int i;
 
-	size_of_regd = sizeof(struct ieee80211_regdomain) +
-	  ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule));
+	size_of_regd =
+		sizeof(struct ieee80211_regdomain) +
+		src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule);
 
 	regd = kzalloc(size_of_regd, GFP_KERNEL);
 	if (!regd)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
 
 	for (i = 0; i < src_regd->n_reg_rules; i++)
 		memcpy(&regd->reg_rules[i], &src_regd->reg_rules[i],
-			sizeof(struct ieee80211_reg_rule));
+		       sizeof(struct ieee80211_reg_rule));
 
-	*dst_regd = regd;
-	return 0;
+	return regd;
 }
 
 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
@@ -347,9 +374,8 @@ static DEFINE_MUTEX(reg_regdb_search_mutex);
 static void reg_regdb_search(struct work_struct *work)
 {
 	struct reg_regdb_search_request *request;
-	const struct ieee80211_regdomain *curdom, *regdom;
-	int i, r;
-	bool set_reg = false;
+	const struct ieee80211_regdomain *curdom, *regdom = NULL;
+	int i;
 
 	mutex_lock(&cfg80211_mutex);
 
@@ -360,14 +386,11 @@ static void reg_regdb_search(struct work_struct *work)
 					   list);
 		list_del(&request->list);
 
-		for (i=0; i<reg_regdb_size; i++) {
+		for (i = 0; i < reg_regdb_size; i++) {
 			curdom = reg_regdb[i];
 
-			if (!memcmp(request->alpha2, curdom->alpha2, 2)) {
-				r = reg_copy_regd(&regdom, curdom);
-				if (r)
-					break;
-				set_reg = true;
+			if (alpha2_equal(request->alpha2, curdom->alpha2)) {
+				regdom = reg_copy_regd(curdom);
 				break;
 			}
 		}
@@ -376,7 +399,7 @@ static void reg_regdb_search(struct work_struct *work)
 	}
 	mutex_unlock(&reg_regdb_search_mutex);
 
-	if (set_reg)
+	if (!IS_ERR_OR_NULL(regdom))
 		set_regdom(regdom);
 
 	mutex_unlock(&cfg80211_mutex);
@@ -434,15 +457,14 @@ static int call_crda(const char *alpha2)
 	return kobject_uevent(&reg_pdev->dev.kobj, KOBJ_CHANGE);
 }
 
-/* Used by nl80211 before kmalloc'ing our regulatory domain */
-bool reg_is_valid_request(const char *alpha2)
+static bool reg_is_valid_request(const char *alpha2)
 {
-	assert_cfg80211_lock();
+	struct regulatory_request *lr = get_last_request();
 
-	if (!last_request)
+	if (!lr || lr->processed)
 		return false;
 
-	return alpha2_equal(last_request->alpha2, alpha2);
+	return alpha2_equal(lr->alpha2, alpha2);
 }
 
 /* Sanity check on a regulatory rule */
@@ -460,7 +482,7 @@ static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
 	freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
 
 	if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
-			freq_range->max_bandwidth_khz > freq_diff)
+	    freq_range->max_bandwidth_khz > freq_diff)
 		return false;
 
 	return true;
@@ -487,8 +509,7 @@ static bool is_valid_rd(const struct ieee80211_regdomain *rd)
 }
 
 static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
-			    u32 center_freq_khz,
-			    u32 bw_khz)
+			    u32 center_freq_khz, u32 bw_khz)
 {
 	u32 start_freq_khz, end_freq_khz;
 
@@ -518,7 +539,7 @@ static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
  * regulatory rule support for other "bands".
  **/
 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
-	u32 freq_khz)
+			      u32 freq_khz)
 {
 #define ONE_GHZ_IN_KHZ	1000000
 	/*
@@ -540,10 +561,9 @@ static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
  * Helper for regdom_intersect(), this does the real
  * mathematical intersection fun
  */
-static int reg_rules_intersect(
-	const struct ieee80211_reg_rule *rule1,
-	const struct ieee80211_reg_rule *rule2,
-	struct ieee80211_reg_rule *intersected_rule)
+static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1,
+			       const struct ieee80211_reg_rule *rule2,
+			       struct ieee80211_reg_rule *intersected_rule)
 {
 	const struct ieee80211_freq_range *freq_range1, *freq_range2;
 	struct ieee80211_freq_range *freq_range;
@@ -560,11 +580,11 @@ static int reg_rules_intersect(
 	power_rule = &intersected_rule->power_rule;
 
 	freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
-		freq_range2->start_freq_khz);
+					 freq_range2->start_freq_khz);
 	freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
-		freq_range2->end_freq_khz);
+				       freq_range2->end_freq_khz);
 	freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz,
-		freq_range2->max_bandwidth_khz);
+					    freq_range2->max_bandwidth_khz);
 
 	freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
 	if (freq_range->max_bandwidth_khz > freq_diff)
@@ -575,7 +595,7 @@ static int reg_rules_intersect(
 	power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
 		power_rule2->max_antenna_gain);
 
-	intersected_rule->flags = (rule1->flags | rule2->flags);
+	intersected_rule->flags = rule1->flags | rule2->flags;
 
 	if (!is_valid_reg_rule(intersected_rule))
 		return -EINVAL;
@@ -596,9 +616,9 @@ static int reg_rules_intersect(
  * resulting intersection of rules between rd1 and rd2. We will
  * kzalloc() this structure for you.
  */
-static struct ieee80211_regdomain *regdom_intersect(
-	const struct ieee80211_regdomain *rd1,
-	const struct ieee80211_regdomain *rd2)
+static struct ieee80211_regdomain *
+regdom_intersect(const struct ieee80211_regdomain *rd1,
+		 const struct ieee80211_regdomain *rd2)
 {
 	int r, size_of_regd;
 	unsigned int x, y;
@@ -607,12 +627,7 @@ static struct ieee80211_regdomain *regdom_intersect(
 	struct ieee80211_reg_rule *intersected_rule;
 	struct ieee80211_regdomain *rd;
 	/* This is just a dummy holder to help us count */
-	struct ieee80211_reg_rule irule;
-
-	/* Uses the stack temporarily for counter arithmetic */
-	intersected_rule = &irule;
-
-	memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule));
+	struct ieee80211_reg_rule dummy_rule;
 
 	if (!rd1 || !rd2)
 		return NULL;
@@ -629,11 +644,8 @@ static struct ieee80211_regdomain *regdom_intersect(
 		rule1 = &rd1->reg_rules[x];
 		for (y = 0; y < rd2->n_reg_rules; y++) {
 			rule2 = &rd2->reg_rules[y];
-			if (!reg_rules_intersect(rule1, rule2,
-					intersected_rule))
+			if (!reg_rules_intersect(rule1, rule2, &dummy_rule))
 				num_rules++;
-			memset(intersected_rule, 0,
-					sizeof(struct ieee80211_reg_rule));
 		}
 	}
 
@@ -641,15 +653,15 @@ static struct ieee80211_regdomain *regdom_intersect(
 		return NULL;
 
 	size_of_regd = sizeof(struct ieee80211_regdomain) +
-		((num_rules + 1) * sizeof(struct ieee80211_reg_rule));
+		       num_rules * sizeof(struct ieee80211_reg_rule);
 
 	rd = kzalloc(size_of_regd, GFP_KERNEL);
 	if (!rd)
 		return NULL;
 
-	for (x = 0; x < rd1->n_reg_rules; x++) {
+	for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) {
 		rule1 = &rd1->reg_rules[x];
-		for (y = 0; y < rd2->n_reg_rules; y++) {
+		for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) {
 			rule2 = &rd2->reg_rules[y];
 			/*
 			 * This time around instead of using the stack lets
@@ -657,8 +669,7 @@ static struct ieee80211_regdomain *regdom_intersect(
 			 * a memcpy()
 			 */
 			intersected_rule = &rd->reg_rules[rule_idx];
-			r = reg_rules_intersect(rule1, rule2,
-				intersected_rule);
+			r = reg_rules_intersect(rule1, rule2, intersected_rule);
 			/*
 			 * No need to memset here the intersected rule here as
 			 * we're not using the stack anymore
@@ -699,34 +710,16 @@ static u32 map_regdom_flags(u32 rd_flags)
 	return channel_flags;
 }
 
-static int freq_reg_info_regd(struct wiphy *wiphy,
-			      u32 center_freq,
-			      u32 desired_bw_khz,
-			      const struct ieee80211_reg_rule **reg_rule,
-			      const struct ieee80211_regdomain *custom_regd)
+static const struct ieee80211_reg_rule *
+freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq,
+		   const struct ieee80211_regdomain *regd)
 {
 	int i;
 	bool band_rule_found = false;
-	const struct ieee80211_regdomain *regd;
 	bool bw_fits = false;
 
-	if (!desired_bw_khz)
-		desired_bw_khz = MHZ_TO_KHZ(20);
-
-	regd = custom_regd ? custom_regd : cfg80211_regdomain;
-
-	/*
-	 * Follow the driver's regulatory domain, if present, unless a country
-	 * IE has been processed or a user wants to help complaince further
-	 */
-	if (!custom_regd &&
-	    last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
-	    last_request->initiator != NL80211_REGDOM_SET_BY_USER &&
-	    wiphy->regd)
-		regd = wiphy->regd;
-
 	if (!regd)
-		return -EINVAL;
+		return ERR_PTR(-EINVAL);
 
 	for (i = 0; i < regd->n_reg_rules; i++) {
 		const struct ieee80211_reg_rule *rr;
@@ -743,33 +736,36 @@ static int freq_reg_info_regd(struct wiphy *wiphy,
 		if (!band_rule_found)
 			band_rule_found = freq_in_rule_band(fr, center_freq);
 
-		bw_fits = reg_does_bw_fit(fr,
-					  center_freq,
-					  desired_bw_khz);
+		bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20));
 
-		if (band_rule_found && bw_fits) {
-			*reg_rule = rr;
-			return 0;
-		}
+		if (band_rule_found && bw_fits)
+			return rr;
 	}
 
 	if (!band_rule_found)
-		return -ERANGE;
+		return ERR_PTR(-ERANGE);
 
-	return -EINVAL;
+	return ERR_PTR(-EINVAL);
 }
 
-int freq_reg_info(struct wiphy *wiphy,
-		  u32 center_freq,
-		  u32 desired_bw_khz,
-		  const struct ieee80211_reg_rule **reg_rule)
+const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
+					       u32 center_freq)
 {
-	assert_cfg80211_lock();
-	return freq_reg_info_regd(wiphy,
-				  center_freq,
-				  desired_bw_khz,
-				  reg_rule,
-				  NULL);
+	const struct ieee80211_regdomain *regd;
+	struct regulatory_request *lr = get_last_request();
+
+	/*
+	 * Follow the driver's regulatory domain, if present, unless a country
+	 * IE has been processed or a user wants to help complaince further
+	 */
+	if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
+	    lr->initiator != NL80211_REGDOM_SET_BY_USER &&
+	    wiphy->regd)
+		regd = get_wiphy_regdom(wiphy);
+	else
+		regd = get_cfg80211_regdom();
+
+	return freq_reg_info_regd(wiphy, center_freq, regd);
 }
 EXPORT_SYMBOL(freq_reg_info);
 
@@ -792,7 +788,6 @@ static const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
 }
 
 static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
-				    u32 desired_bw_khz,
 				    const struct ieee80211_reg_rule *reg_rule)
 {
 	const struct ieee80211_power_rule *power_rule;
@@ -807,21 +802,16 @@ static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
 	else
 		snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain);
 
-	REG_DBG_PRINT("Updating information on frequency %d MHz "
-		      "for a %d MHz width channel with regulatory rule:\n",
-		      chan->center_freq,
-		      KHZ_TO_MHZ(desired_bw_khz));
+	REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
+		      chan->center_freq);
 
 	REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
-		      freq_range->start_freq_khz,
-		      freq_range->end_freq_khz,
-		      freq_range->max_bandwidth_khz,
-		      max_antenna_gain,
+		      freq_range->start_freq_khz, freq_range->end_freq_khz,
+		      freq_range->max_bandwidth_khz, max_antenna_gain,
 		      power_rule->max_eirp);
 }
 #else
 static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
-				    u32 desired_bw_khz,
 				    const struct ieee80211_reg_rule *reg_rule)
 {
 	return;
@@ -831,43 +821,25 @@ static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
 /*
  * Note that right now we assume the desired channel bandwidth
  * is always 20 MHz for each individual channel (HT40 uses 20 MHz
- * per channel, the primary and the extension channel). To support
- * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a
- * new ieee80211_channel.target_bw and re run the regulatory check
- * on the wiphy with the target_bw specified. Then we can simply use
- * that below for the desired_bw_khz below.
+ * per channel, the primary and the extension channel).
  */
 static void handle_channel(struct wiphy *wiphy,
 			   enum nl80211_reg_initiator initiator,
-			   enum ieee80211_band band,
-			   unsigned int chan_idx)
+			   struct ieee80211_channel *chan)
 {
-	int r;
 	u32 flags, bw_flags = 0;
-	u32 desired_bw_khz = MHZ_TO_KHZ(20);
 	const struct ieee80211_reg_rule *reg_rule = NULL;
 	const struct ieee80211_power_rule *power_rule = NULL;
 	const struct ieee80211_freq_range *freq_range = NULL;
-	struct ieee80211_supported_band *sband;
-	struct ieee80211_channel *chan;
 	struct wiphy *request_wiphy = NULL;
+	struct regulatory_request *lr = get_last_request();
 
-	assert_cfg80211_lock();
-
-	request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
-
-	sband = wiphy->bands[band];
-	BUG_ON(chan_idx >= sband->n_channels);
-	chan = &sband->channels[chan_idx];
+	request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
 
 	flags = chan->orig_flags;
 
-	r = freq_reg_info(wiphy,
-			  MHZ_TO_KHZ(chan->center_freq),
-			  desired_bw_khz,
-			  &reg_rule);
-
-	if (r) {
+	reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
+	if (IS_ERR(reg_rule)) {
 		/*
 		 * We will disable all channels that do not match our
 		 * received regulatory rule unless the hint is coming
@@ -879,7 +851,7 @@ static void handle_channel(struct wiphy *wiphy,
 		 * while 5 GHz is still supported.
 		 */
 		if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
-		    r == -ERANGE)
+		    PTR_ERR(reg_rule) == -ERANGE)
 			return;
 
 		REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq);
@@ -887,7 +859,7 @@ static void handle_channel(struct wiphy *wiphy,
 		return;
 	}
 
-	chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule);
+	chan_reg_rule_print_dbg(chan, reg_rule);
 
 	power_rule = &reg_rule->power_rule;
 	freq_range = &reg_rule->freq_range;
@@ -895,7 +867,7 @@ static void handle_channel(struct wiphy *wiphy,
 	if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40))
 		bw_flags = IEEE80211_CHAN_NO_HT40;
 
-	if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
+	if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
 	    request_wiphy && request_wiphy == wiphy &&
 	    request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) {
 		/*
@@ -914,8 +886,9 @@ static void handle_channel(struct wiphy *wiphy,
 
 	chan->beacon_found = false;
 	chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
-	chan->max_antenna_gain = min(chan->orig_mag,
-		(int) MBI_TO_DBI(power_rule->max_antenna_gain));
+	chan->max_antenna_gain =
+		min_t(int, chan->orig_mag,
+		      MBI_TO_DBI(power_rule->max_antenna_gain));
 	chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
 	if (chan->orig_mpwr) {
 		/*
@@ -935,68 +908,65 @@ static void handle_channel(struct wiphy *wiphy,
 }
 
 static void handle_band(struct wiphy *wiphy,
-			enum ieee80211_band band,
-			enum nl80211_reg_initiator initiator)
+			enum nl80211_reg_initiator initiator,
+			struct ieee80211_supported_band *sband)
 {
 	unsigned int i;
-	struct ieee80211_supported_band *sband;
 
-	BUG_ON(!wiphy->bands[band]);
-	sband = wiphy->bands[band];
+	if (!sband)
+		return;
 
 	for (i = 0; i < sband->n_channels; i++)
-		handle_channel(wiphy, initiator, band, i);
+		handle_channel(wiphy, initiator, &sband->channels[i]);
 }
 
 static bool reg_request_cell_base(struct regulatory_request *request)
 {
 	if (request->initiator != NL80211_REGDOM_SET_BY_USER)
 		return false;
-	if (request->user_reg_hint_type != NL80211_USER_REG_HINT_CELL_BASE)
-		return false;
-	return true;
+	return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
 }
 
 bool reg_last_request_cell_base(void)
 {
 	bool val;
-	assert_cfg80211_lock();
 
 	mutex_lock(&reg_mutex);
-	val = reg_request_cell_base(last_request);
+	val = reg_request_cell_base(get_last_request());
 	mutex_unlock(&reg_mutex);
+
 	return val;
 }
 
 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
-
 /* Core specific check */
-static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
+static enum reg_request_treatment
+reg_ignore_cell_hint(struct regulatory_request *pending_request)
 {
+	struct regulatory_request *lr = get_last_request();
+
 	if (!reg_num_devs_support_basehint)
-		return -EOPNOTSUPP;
+		return REG_REQ_IGNORE;
 
-	if (reg_request_cell_base(last_request)) {
-		if (!regdom_changes(pending_request->alpha2))
-			return -EALREADY;
-		return 0;
-	}
-	return 0;
+	if (reg_request_cell_base(lr) &&
+	    !regdom_changes(pending_request->alpha2))
+		return REG_REQ_ALREADY_SET;
+
+	return REG_REQ_OK;
 }
 
 /* Device specific check */
 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
 {
-	if (!(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS))
-		return true;
-	return false;
+	return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
 }
 #else
 static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
 {
-	return -EOPNOTSUPP;
+	return REG_REQ_IGNORE;
 }
-static int reg_dev_ignore_cell_hint(struct wiphy *wiphy)
+
+static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
 {
 	return true;
 }
@@ -1006,18 +976,17 @@ static int reg_dev_ignore_cell_hint(struct wiphy *wiphy)
 static bool ignore_reg_update(struct wiphy *wiphy,
 			      enum nl80211_reg_initiator initiator)
 {
-	if (!last_request) {
-		REG_DBG_PRINT("Ignoring regulatory request %s since "
-			      "last_request is not set\n",
+	struct regulatory_request *lr = get_last_request();
+
+	if (!lr) {
+		REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n",
 			      reg_initiator_name(initiator));
 		return true;
 	}
 
 	if (initiator == NL80211_REGDOM_SET_BY_CORE &&
 	    wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
-		REG_DBG_PRINT("Ignoring regulatory request %s "
-			      "since the driver uses its own custom "
-			      "regulatory domain\n",
+		REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n",
 			      reg_initiator_name(initiator));
 		return true;
 	}
@@ -1028,22 +997,35 @@ static bool ignore_reg_update(struct wiphy *wiphy,
 	 */
 	if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd &&
 	    initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
-	    !is_world_regdom(last_request->alpha2)) {
-		REG_DBG_PRINT("Ignoring regulatory request %s "
-			      "since the driver requires its own regulatory "
-			      "domain to be set first\n",
+	    !is_world_regdom(lr->alpha2)) {
+		REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n",
 			      reg_initiator_name(initiator));
 		return true;
 	}
 
-	if (reg_request_cell_base(last_request))
+	if (reg_request_cell_base(lr))
 		return reg_dev_ignore_cell_hint(wiphy);
 
 	return false;
 }
 
-static void handle_reg_beacon(struct wiphy *wiphy,
-			      unsigned int chan_idx,
+static bool reg_is_world_roaming(struct wiphy *wiphy)
+{
+	const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
+	const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
+	struct regulatory_request *lr = get_last_request();
+
+	if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
+		return true;
+
+	if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
+	    wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY)
+		return true;
+
+	return false;
+}
+
+static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
 			      struct reg_beacon *reg_beacon)
 {
 	struct ieee80211_supported_band *sband;
@@ -1051,8 +1033,6 @@ static void handle_reg_beacon(struct wiphy *wiphy,
 	bool channel_changed = false;
 	struct ieee80211_channel chan_before;
 
-	assert_cfg80211_lock();
-
 	sband = wiphy->bands[reg_beacon->chan.band];
 	chan = &sband->channels[chan_idx];
 
@@ -1064,6 +1044,9 @@ static void handle_reg_beacon(struct wiphy *wiphy,
 
 	chan->beacon_found = true;
 
+	if (!reg_is_world_roaming(wiphy))
+		return;
+
 	if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS)
 		return;
 
@@ -1094,8 +1077,6 @@ static void wiphy_update_new_beacon(struct wiphy *wiphy,
 	unsigned int i;
 	struct ieee80211_supported_band *sband;
 
-	assert_cfg80211_lock();
-
 	if (!wiphy->bands[reg_beacon->chan.band])
 		return;
 
@@ -1114,11 +1095,6 @@ static void wiphy_update_beacon_reg(struct wiphy *wiphy)
 	struct ieee80211_supported_band *sband;
 	struct reg_beacon *reg_beacon;
 
-	assert_cfg80211_lock();
-
-	if (list_empty(&reg_beacon_list))
-		return;
-
 	list_for_each_entry(reg_beacon, &reg_beacon_list, list) {
 		if (!wiphy->bands[reg_beacon->chan.band])
 			continue;
@@ -1128,18 +1104,6 @@ static void wiphy_update_beacon_reg(struct wiphy *wiphy)
 	}
 }
 
-static bool reg_is_world_roaming(struct wiphy *wiphy)
-{
-	if (is_world_regdom(cfg80211_regdomain->alpha2) ||
-	    (wiphy->regd && is_world_regdom(wiphy->regd->alpha2)))
-		return true;
-	if (last_request &&
-	    last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
-	    wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY)
-		return true;
-	return false;
-}
-
 /* Reap the advantages of previously found beacons */
 static void reg_process_beacons(struct wiphy *wiphy)
 {
@@ -1149,39 +1113,29 @@ static void reg_process_beacons(struct wiphy *wiphy)
 	 */
 	if (!last_request)
 		return;
-	if (!reg_is_world_roaming(wiphy))
-		return;
 	wiphy_update_beacon_reg(wiphy);
 }
 
-static bool is_ht40_not_allowed(struct ieee80211_channel *chan)
+static bool is_ht40_allowed(struct ieee80211_channel *chan)
 {
 	if (!chan)
-		return true;
+		return false;
 	if (chan->flags & IEEE80211_CHAN_DISABLED)
-		return true;
+		return false;
 	/* This would happen when regulatory rules disallow HT40 completely */
-	if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40)))
-		return true;
-	return false;
+	if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
+		return false;
+	return true;
 }
 
 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
-					 enum ieee80211_band band,
-					 unsigned int chan_idx)
+					 struct ieee80211_channel *channel)
 {
-	struct ieee80211_supported_band *sband;
-	struct ieee80211_channel *channel;
+	struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
 	struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
 	unsigned int i;
 
-	assert_cfg80211_lock();
-
-	sband = wiphy->bands[band];
-	BUG_ON(chan_idx >= sband->n_channels);
-	channel = &sband->channels[chan_idx];
-
-	if (is_ht40_not_allowed(channel)) {
+	if (!is_ht40_allowed(channel)) {
 		channel->flags |= IEEE80211_CHAN_NO_HT40;
 		return;
 	}
@@ -1192,6 +1146,7 @@ static void reg_process_ht_flags_channel(struct wiphy *wiphy,
 	 */
 	for (i = 0; i < sband->n_channels; i++) {
 		struct ieee80211_channel *c = &sband->channels[i];
+
 		if (c->center_freq == (channel->center_freq - 20))
 			channel_before = c;
 		if (c->center_freq == (channel->center_freq + 20))
@@ -1203,28 +1158,27 @@ static void reg_process_ht_flags_channel(struct wiphy *wiphy,
 	 * if that ever changes we also need to change the below logic
 	 * to include that as well.
 	 */
-	if (is_ht40_not_allowed(channel_before))
+	if (!is_ht40_allowed(channel_before))
 		channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
 	else
 		channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
 
-	if (is_ht40_not_allowed(channel_after))
+	if (!is_ht40_allowed(channel_after))
 		channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
 	else
 		channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
 }
 
 static void reg_process_ht_flags_band(struct wiphy *wiphy,
-				      enum ieee80211_band band)
+				      struct ieee80211_supported_band *sband)
 {
 	unsigned int i;
-	struct ieee80211_supported_band *sband;
 
-	BUG_ON(!wiphy->bands[band]);
-	sband = wiphy->bands[band];
+	if (!sband)
+		return;
 
 	for (i = 0; i < sband->n_channels; i++)
-		reg_process_ht_flags_channel(wiphy, band, i);
+		reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
 }
 
 static void reg_process_ht_flags(struct wiphy *wiphy)
@@ -1234,34 +1188,29 @@ static void reg_process_ht_flags(struct wiphy *wiphy)
 	if (!wiphy)
 		return;
 
-	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
-		if (wiphy->bands[band])
-			reg_process_ht_flags_band(wiphy, band);
-	}
-
+	for (band = 0; band < IEEE80211_NUM_BANDS; band++)
+		reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
 }
 
 static void wiphy_update_regulatory(struct wiphy *wiphy,
 				    enum nl80211_reg_initiator initiator)
 {
 	enum ieee80211_band band;
-
-	assert_reg_lock();
+	struct regulatory_request *lr = get_last_request();
 
 	if (ignore_reg_update(wiphy, initiator))
 		return;
 
-	last_request->dfs_region = cfg80211_regdomain->dfs_region;
+	lr->dfs_region = get_cfg80211_regdom()->dfs_region;
 
-	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
-		if (wiphy->bands[band])
-			handle_band(wiphy, band, initiator);
-	}
+	for (band = 0; band < IEEE80211_NUM_BANDS; band++)
+		handle_band(wiphy, initiator, wiphy->bands[band]);
 
 	reg_process_beacons(wiphy);
 	reg_process_ht_flags(wiphy);
+
 	if (wiphy->reg_notifier)
-		wiphy->reg_notifier(wiphy, last_request);
+		wiphy->reg_notifier(wiphy, lr);
 }
 
 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
@@ -1269,6 +1218,8 @@ static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
 	struct cfg80211_registered_device *rdev;
 	struct wiphy *wiphy;
 
+	assert_cfg80211_lock();
+
 	list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 		wiphy = &rdev->wiphy;
 		wiphy_update_regulatory(wiphy, initiator);
@@ -1280,47 +1231,30 @@ static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
 		if (initiator == NL80211_REGDOM_SET_BY_CORE &&
 		    wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY &&
 		    wiphy->reg_notifier)
-			wiphy->reg_notifier(wiphy, last_request);
+			wiphy->reg_notifier(wiphy, get_last_request());
 	}
 }
 
 static void handle_channel_custom(struct wiphy *wiphy,
-				  enum ieee80211_band band,
-				  unsigned int chan_idx,
+				  struct ieee80211_channel *chan,
 				  const struct ieee80211_regdomain *regd)
 {
-	int r;
-	u32 desired_bw_khz = MHZ_TO_KHZ(20);
 	u32 bw_flags = 0;
 	const struct ieee80211_reg_rule *reg_rule = NULL;
 	const struct ieee80211_power_rule *power_rule = NULL;
 	const struct ieee80211_freq_range *freq_range = NULL;
-	struct ieee80211_supported_band *sband;
-	struct ieee80211_channel *chan;
-
-	assert_reg_lock();
 
-	sband = wiphy->bands[band];
-	BUG_ON(chan_idx >= sband->n_channels);
-	chan = &sband->channels[chan_idx];
-
-	r = freq_reg_info_regd(wiphy,
-			       MHZ_TO_KHZ(chan->center_freq),
-			       desired_bw_khz,
-			       &reg_rule,
-			       regd);
+	reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq),
+				      regd);
 
-	if (r) {
-		REG_DBG_PRINT("Disabling freq %d MHz as custom "
-			      "regd has no rule that fits a %d MHz "
-			      "wide channel\n",
-			      chan->center_freq,
-			      KHZ_TO_MHZ(desired_bw_khz));
+	if (IS_ERR(reg_rule)) {
+		REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
+			      chan->center_freq);
 		chan->flags = IEEE80211_CHAN_DISABLED;
 		return;
 	}
 
-	chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule);
+	chan_reg_rule_print_dbg(chan, reg_rule);
 
 	power_rule = &reg_rule->power_rule;
 	freq_range = &reg_rule->freq_range;
@@ -1334,17 +1268,17 @@ static void handle_channel_custom(struct wiphy *wiphy,
 		(int) MBM_TO_DBM(power_rule->max_eirp);
 }
 
-static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band,
+static void handle_band_custom(struct wiphy *wiphy,
+			       struct ieee80211_supported_band *sband,
 			       const struct ieee80211_regdomain *regd)
 {
 	unsigned int i;
-	struct ieee80211_supported_band *sband;
 
-	BUG_ON(!wiphy->bands[band]);
-	sband = wiphy->bands[band];
+	if (!sband)
+		return;
 
 	for (i = 0; i < sband->n_channels; i++)
-		handle_channel_custom(wiphy, band, i, regd);
+		handle_channel_custom(wiphy, &sband->channels[i], regd);
 }
 
 /* Used by drivers prior to wiphy registration */
@@ -1354,60 +1288,50 @@ void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
 	enum ieee80211_band band;
 	unsigned int bands_set = 0;
 
-	mutex_lock(&reg_mutex);
 	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 		if (!wiphy->bands[band])
 			continue;
-		handle_band_custom(wiphy, band, regd);
+		handle_band_custom(wiphy, wiphy->bands[band], regd);
 		bands_set++;
 	}
-	mutex_unlock(&reg_mutex);
 
 	/*
 	 * no point in calling this if it won't have any effect
-	 * on your device's supportd bands.
+	 * on your device's supported bands.
 	 */
 	WARN_ON(!bands_set);
 }
 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
 
-/*
- * Return value which can be used by ignore_request() to indicate
- * it has been determined we should intersect two regulatory domains
- */
-#define REG_INTERSECT	1
-
 /* This has the logic which determines when a new request
  * should be ignored. */
-static int ignore_request(struct wiphy *wiphy,
+static enum reg_request_treatment
+get_reg_request_treatment(struct wiphy *wiphy,
 			  struct regulatory_request *pending_request)
 {
 	struct wiphy *last_wiphy = NULL;
-
-	assert_cfg80211_lock();
+	struct regulatory_request *lr = get_last_request();
 
 	/* All initial requests are respected */
-	if (!last_request)
-		return 0;
+	if (!lr)
+		return REG_REQ_OK;
 
 	switch (pending_request->initiator) {
 	case NL80211_REGDOM_SET_BY_CORE:
-		return 0;
+		return REG_REQ_OK;
 	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
-
-		if (reg_request_cell_base(last_request)) {
+		if (reg_request_cell_base(lr)) {
 			/* Trust a Cell base station over the AP's country IE */
 			if (regdom_changes(pending_request->alpha2))
-				return -EOPNOTSUPP;
-			return -EALREADY;
+				return REG_REQ_IGNORE;
+			return REG_REQ_ALREADY_SET;
 		}
 
-		last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
+		last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
 
 		if (unlikely(!is_an_alpha2(pending_request->alpha2)))
 			return -EINVAL;
-		if (last_request->initiator ==
-		    NL80211_REGDOM_SET_BY_COUNTRY_IE) {
+		if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
 			if (last_wiphy != wiphy) {
 				/*
 				 * Two cards with two APs claiming different
@@ -1416,23 +1340,23 @@ static int ignore_request(struct wiphy *wiphy,
 				 * to be correct. Reject second one for now.
 				 */
 				if (regdom_changes(pending_request->alpha2))
-					return -EOPNOTSUPP;
-				return -EALREADY;
+					return REG_REQ_IGNORE;
+				return REG_REQ_ALREADY_SET;
 			}
 			/*
 			 * Two consecutive Country IE hints on the same wiphy.
 			 * This should be picked up early by the driver/stack
 			 */
 			if (WARN_ON(regdom_changes(pending_request->alpha2)))
-				return 0;
-			return -EALREADY;
+				return REG_REQ_OK;
+			return REG_REQ_ALREADY_SET;
 		}
 		return 0;
 	case NL80211_REGDOM_SET_BY_DRIVER:
-		if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) {
+		if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
 			if (regdom_changes(pending_request->alpha2))
-				return 0;
-			return -EALREADY;
+				return REG_REQ_OK;
+			return REG_REQ_ALREADY_SET;
 		}
 
 		/*
@@ -1440,59 +1364,59 @@ static int ignore_request(struct wiphy *wiphy,
 		 * back in or if you add a new device for which the previously
 		 * loaded card also agrees on the regulatory domain.
 		 */
-		if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
+		if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
 		    !regdom_changes(pending_request->alpha2))
-			return -EALREADY;
+			return REG_REQ_ALREADY_SET;
 
-		return REG_INTERSECT;
+		return REG_REQ_INTERSECT;
 	case NL80211_REGDOM_SET_BY_USER:
 		if (reg_request_cell_base(pending_request))
 			return reg_ignore_cell_hint(pending_request);
 
-		if (reg_request_cell_base(last_request))
-			return -EOPNOTSUPP;
+		if (reg_request_cell_base(lr))
+			return REG_REQ_IGNORE;
 
-		if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
-			return REG_INTERSECT;
+		if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
+			return REG_REQ_INTERSECT;
 		/*
 		 * If the user knows better the user should set the regdom
 		 * to their country before the IE is picked up
 		 */
-		if (last_request->initiator == NL80211_REGDOM_SET_BY_USER &&
-			  last_request->intersect)
-			return -EOPNOTSUPP;
+		if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
+		    lr->intersect)
+			return REG_REQ_IGNORE;
 		/*
 		 * Process user requests only after previous user/driver/core
 		 * requests have been processed
 		 */
-		if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE ||
-		    last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
-		    last_request->initiator == NL80211_REGDOM_SET_BY_USER) {
-			if (regdom_changes(last_request->alpha2))
-				return -EAGAIN;
-		}
+		if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
+		     lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
+		     lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
+		    regdom_changes(lr->alpha2))
+			return REG_REQ_IGNORE;
 
 		if (!regdom_changes(pending_request->alpha2))
-			return -EALREADY;
+			return REG_REQ_ALREADY_SET;
 
-		return 0;
+		return REG_REQ_OK;
 	}
 
-	return -EINVAL;
+	return REG_REQ_IGNORE;
 }
 
 static void reg_set_request_processed(void)
 {
 	bool need_more_processing = false;
+	struct regulatory_request *lr = get_last_request();
 
-	last_request->processed = true;
+	lr->processed = true;
 
 	spin_lock(&reg_requests_lock);
 	if (!list_empty(&reg_requests_list))
 		need_more_processing = true;
 	spin_unlock(&reg_requests_lock);
 
-	if (last_request->initiator == NL80211_REGDOM_SET_BY_USER)
+	if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
 		cancel_delayed_work(&reg_timeout);
 
 	if (need_more_processing)
@@ -1508,116 +1432,122 @@ static void reg_set_request_processed(void)
  * The Wireless subsystem can use this function to hint to the wireless core
  * what it believes should be the current regulatory domain.
  *
- * Returns zero if all went fine, %-EALREADY if a regulatory domain had
- * already been set or other standard error codes.
+ * Returns one of the different reg request treatment values.
  *
- * Caller must hold &cfg80211_mutex and &reg_mutex
+ * Caller must hold &reg_mutex
  */
-static int __regulatory_hint(struct wiphy *wiphy,
-			     struct regulatory_request *pending_request)
+static enum reg_request_treatment
+__regulatory_hint(struct wiphy *wiphy,
+		  struct regulatory_request *pending_request)
 {
+	const struct ieee80211_regdomain *regd;
 	bool intersect = false;
-	int r = 0;
-
-	assert_cfg80211_lock();
+	enum reg_request_treatment treatment;
+	struct regulatory_request *lr;
 
-	r = ignore_request(wiphy, pending_request);
+	treatment = get_reg_request_treatment(wiphy, pending_request);
 
-	if (r == REG_INTERSECT) {
+	switch (treatment) {
+	case REG_REQ_INTERSECT:
 		if (pending_request->initiator ==
 		    NL80211_REGDOM_SET_BY_DRIVER) {
-			r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);
-			if (r) {
+			regd = reg_copy_regd(get_cfg80211_regdom());
+			if (IS_ERR(regd)) {
 				kfree(pending_request);
-				return r;
+				return PTR_ERR(regd);
 			}
+			rcu_assign_pointer(wiphy->regd, regd);
 		}
 		intersect = true;
-	} else if (r) {
+		break;
+	case REG_REQ_OK:
+		break;
+	default:
 		/*
 		 * If the regulatory domain being requested by the
 		 * driver has already been set just copy it to the
 		 * wiphy
 		 */
-		if (r == -EALREADY &&
-		    pending_request->initiator ==
-		    NL80211_REGDOM_SET_BY_DRIVER) {
-			r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);
-			if (r) {
+		if (treatment == REG_REQ_ALREADY_SET &&
+		    pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) {
+			regd = reg_copy_regd(get_cfg80211_regdom());
+			if (IS_ERR(regd)) {
 				kfree(pending_request);
-				return r;
+				return REG_REQ_IGNORE;
 			}
-			r = -EALREADY;
+			treatment = REG_REQ_ALREADY_SET;
+			rcu_assign_pointer(wiphy->regd, regd);
 			goto new_request;
 		}
 		kfree(pending_request);
-		return r;
+		return treatment;
 	}
 
 new_request:
-	if (last_request != &core_request_world)
-		kfree(last_request);
+	lr = get_last_request();
+	if (lr != &core_request_world && lr)
+		kfree_rcu(lr, rcu_head);
 
-	last_request = pending_request;
-	last_request->intersect = intersect;
+	pending_request->intersect = intersect;
+	pending_request->processed = false;
+	rcu_assign_pointer(last_request, pending_request);
+	lr = pending_request;
 
 	pending_request = NULL;
 
-	if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) {
-		user_alpha2[0] = last_request->alpha2[0];
-		user_alpha2[1] = last_request->alpha2[1];
+	if (lr->initiator == NL80211_REGDOM_SET_BY_USER) {
+		user_alpha2[0] = lr->alpha2[0];
+		user_alpha2[1] = lr->alpha2[1];
 	}
 
-	/* When r == REG_INTERSECT we do need to call CRDA */
-	if (r < 0) {
+	/* When r == REG_REQ_INTERSECT we do need to call CRDA */
+	if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) {
 		/*
 		 * Since CRDA will not be called in this case as we already
 		 * have applied the requested regulatory domain before we just
 		 * inform userspace we have processed the request
 		 */
-		if (r == -EALREADY) {
-			nl80211_send_reg_change_event(last_request);
+		if (treatment == REG_REQ_ALREADY_SET) {
+			nl80211_send_reg_change_event(lr);
 			reg_set_request_processed();
 		}
-		return r;
+		return treatment;
 	}
 
-	return call_crda(last_request->alpha2);
+	if (call_crda(lr->alpha2))
+		return REG_REQ_IGNORE;
+	return REG_REQ_OK;
 }
 
 /* This processes *all* regulatory hints */
 static void reg_process_hint(struct regulatory_request *reg_request,
 			     enum nl80211_reg_initiator reg_initiator)
 {
-	int r = 0;
 	struct wiphy *wiphy = NULL;
 
-	BUG_ON(!reg_request->alpha2);
+	if (WARN_ON(!reg_request->alpha2))
+		return;
 
-	if (wiphy_idx_valid(reg_request->wiphy_idx))
+	if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
 		wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
 
-	if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER &&
-	    !wiphy) {
+	if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) {
 		kfree(reg_request);
 		return;
 	}
 
-	r = __regulatory_hint(wiphy, reg_request);
-	/* This is required so that the orig_* parameters are saved */
-	if (r == -EALREADY && wiphy &&
-	    wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) {
-		wiphy_update_regulatory(wiphy, reg_initiator);
-		return;
+	switch (__regulatory_hint(wiphy, reg_request)) {
+	case REG_REQ_ALREADY_SET:
+		/* This is required so that the orig_* parameters are saved */
+		if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY)
+			wiphy_update_regulatory(wiphy, reg_initiator);
+		break;
+	default:
+		if (reg_initiator == NL80211_REGDOM_SET_BY_USER)
+			schedule_delayed_work(&reg_timeout,
+					      msecs_to_jiffies(3142));
+		break;
 	}
-
-	/*
-	 * We only time out user hints, given that they should be the only
-	 * source of bogus requests.
-	 */
-	if (r != -EALREADY &&
-	    reg_initiator == NL80211_REGDOM_SET_BY_USER)
-		schedule_delayed_work(&reg_timeout, msecs_to_jiffies(3142));
 }
 
 /*
@@ -1627,15 +1557,15 @@ static void reg_process_hint(struct regulatory_request *reg_request,
  */
 static void reg_process_pending_hints(void)
 {
-	struct regulatory_request *reg_request;
+	struct regulatory_request *reg_request, *lr;
 
 	mutex_lock(&cfg80211_mutex);
 	mutex_lock(&reg_mutex);
+	lr = get_last_request();
 
 	/* When last_request->processed becomes true this will be rescheduled */
-	if (last_request && !last_request->processed) {
-		REG_DBG_PRINT("Pending regulatory request, waiting "
-			      "for it to be processed...\n");
+	if (lr && !lr->processed) {
+		REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n");
 		goto out;
 	}
 
@@ -1666,23 +1596,14 @@ static void reg_process_pending_beacon_hints(void)
 	struct cfg80211_registered_device *rdev;
 	struct reg_beacon *pending_beacon, *tmp;
 
-	/*
-	 * No need to hold the reg_mutex here as we just touch wiphys
-	 * and do not read or access regulatory variables.
-	 */
 	mutex_lock(&cfg80211_mutex);
+	mutex_lock(&reg_mutex);
 
 	/* This goes through the _pending_ beacon list */
 	spin_lock_bh(&reg_pending_beacons_lock);
 
-	if (list_empty(&reg_pending_beacons)) {
-		spin_unlock_bh(&reg_pending_beacons_lock);
-		goto out;
-	}
-
 	list_for_each_entry_safe(pending_beacon, tmp,
 				 &reg_pending_beacons, list) {
-
 		list_del_init(&pending_beacon->list);
 
 		/* Applies the beacon hint to current wiphys */
@@ -1694,7 +1615,7 @@ static void reg_process_pending_beacon_hints(void)
 	}
 
 	spin_unlock_bh(&reg_pending_beacons_lock);
-out:
+	mutex_unlock(&reg_mutex);
 	mutex_unlock(&cfg80211_mutex);
 }
 
@@ -1706,10 +1627,8 @@ static void reg_todo(struct work_struct *work)
 
 static void queue_regulatory_request(struct regulatory_request *request)
 {
-	if (isalpha(request->alpha2[0]))
-		request->alpha2[0] = toupper(request->alpha2[0]);
-	if (isalpha(request->alpha2[1]))
-		request->alpha2[1] = toupper(request->alpha2[1]);
+	request->alpha2[0] = toupper(request->alpha2[0]);
+	request->alpha2[1] = toupper(request->alpha2[1]);
 
 	spin_lock(&reg_requests_lock);
 	list_add_tail(&request->list, &reg_requests_list);
@@ -1726,8 +1645,7 @@ static int regulatory_hint_core(const char *alpha2)
 {
 	struct regulatory_request *request;
 
-	request = kzalloc(sizeof(struct regulatory_request),
-			  GFP_KERNEL);
+	request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
 	if (!request)
 		return -ENOMEM;
 
@@ -1746,13 +1664,14 @@ int regulatory_hint_user(const char *alpha2,
 {
 	struct regulatory_request *request;
 
-	BUG_ON(!alpha2);
+	if (WARN_ON(!alpha2))
+		return -EINVAL;
 
 	request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
 	if (!request)
 		return -ENOMEM;
 
-	request->wiphy_idx = WIPHY_IDX_STALE;
+	request->wiphy_idx = WIPHY_IDX_INVALID;
 	request->alpha2[0] = alpha2[0];
 	request->alpha2[1] = alpha2[1];
 	request->initiator = NL80211_REGDOM_SET_BY_USER;
@@ -1768,8 +1687,8 @@ int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
 {
 	struct regulatory_request *request;
 
-	BUG_ON(!alpha2);
-	BUG_ON(!wiphy);
+	if (WARN_ON(!alpha2 || !wiphy))
+		return -EINVAL;
 
 	request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
 	if (!request)
@@ -1777,9 +1696,6 @@ int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
 
 	request->wiphy_idx = get_wiphy_idx(wiphy);
 
-	/* Must have registered wiphy first */
-	BUG_ON(!wiphy_idx_valid(request->wiphy_idx));
-
 	request->alpha2[0] = alpha2[0];
 	request->alpha2[1] = alpha2[1];
 	request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
@@ -1794,18 +1710,17 @@ EXPORT_SYMBOL(regulatory_hint);
  * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and
  * therefore cannot iterate over the rdev list here.
  */
-void regulatory_hint_11d(struct wiphy *wiphy,
-			 enum ieee80211_band band,
-			 const u8 *country_ie,
-			 u8 country_ie_len)
+void regulatory_hint_11d(struct wiphy *wiphy, enum ieee80211_band band,
+			 const u8 *country_ie, u8 country_ie_len)
 {
 	char alpha2[2];
 	enum environment_cap env = ENVIRON_ANY;
-	struct regulatory_request *request;
+	struct regulatory_request *request, *lr;
 
 	mutex_lock(&reg_mutex);
+	lr = get_last_request();
 
-	if (unlikely(!last_request))
+	if (unlikely(!lr))
 		goto out;
 
 	/* IE len must be evenly divisible by 2 */
@@ -1828,9 +1743,8 @@ void regulatory_hint_11d(struct wiphy *wiphy,
 	 * We leave conflict resolution to the workqueue, where can hold
 	 * cfg80211_mutex.
 	 */
-	if (likely(last_request->initiator ==
-	    NL80211_REGDOM_SET_BY_COUNTRY_IE &&
-	    wiphy_idx_valid(last_request->wiphy_idx)))
+	if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
+	    lr->wiphy_idx != WIPHY_IDX_INVALID)
 		goto out;
 
 	request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
@@ -1843,12 +1757,7 @@ void regulatory_hint_11d(struct wiphy *wiphy,
 	request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
 	request->country_ie_env = env;
 
-	mutex_unlock(&reg_mutex);
-
 	queue_regulatory_request(request);
-
-	return;
-
 out:
 	mutex_unlock(&reg_mutex);
 }
@@ -1863,8 +1772,7 @@ static void restore_alpha2(char *alpha2, bool reset_user)
 	if (is_user_regdom_saved()) {
 		/* Unless we're asked to ignore it and reset it */
 		if (reset_user) {
-			REG_DBG_PRINT("Restoring regulatory settings "
-			       "including user preference\n");
+			REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
 			user_alpha2[0] = '9';
 			user_alpha2[1] = '7';
 
@@ -1874,26 +1782,20 @@ static void restore_alpha2(char *alpha2, bool reset_user)
 			 * back as they were for a full restore.
 			 */
 			if (!is_world_regdom(ieee80211_regdom)) {
-				REG_DBG_PRINT("Keeping preference on "
-				       "module parameter ieee80211_regdom: %c%c\n",
-				       ieee80211_regdom[0],
-				       ieee80211_regdom[1]);
+				REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
+					      ieee80211_regdom[0], ieee80211_regdom[1]);
 				alpha2[0] = ieee80211_regdom[0];
 				alpha2[1] = ieee80211_regdom[1];
 			}
 		} else {
-			REG_DBG_PRINT("Restoring regulatory settings "
-			       "while preserving user preference for: %c%c\n",
-			       user_alpha2[0],
-			       user_alpha2[1]);
+			REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
+				      user_alpha2[0], user_alpha2[1]);
 			alpha2[0] = user_alpha2[0];
 			alpha2[1] = user_alpha2[1];
 		}
 	} else if (!is_world_regdom(ieee80211_regdom)) {
-		REG_DBG_PRINT("Keeping preference on "
-		       "module parameter ieee80211_regdom: %c%c\n",
-		       ieee80211_regdom[0],
-		       ieee80211_regdom[1]);
+		REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
+			      ieee80211_regdom[0], ieee80211_regdom[1]);
 		alpha2[0] = ieee80211_regdom[0];
 		alpha2[1] = ieee80211_regdom[1];
 	} else
@@ -1948,7 +1850,7 @@ static void restore_regulatory_settings(bool reset_user)
 	mutex_lock(&cfg80211_mutex);
 	mutex_lock(&reg_mutex);
 
-	reset_regdomains(true);
+	reset_regdomains(true, &world_regdom);
 	restore_alpha2(alpha2, reset_user);
 
 	/*
@@ -1958,49 +1860,35 @@ static void restore_regulatory_settings(bool reset_user)
 	 * settings.
 	 */
 	spin_lock(&reg_requests_lock);
-	if (!list_empty(&reg_requests_list)) {
-		list_for_each_entry_safe(reg_request, tmp,
-					 &reg_requests_list, list) {
-			if (reg_request->initiator !=
-			    NL80211_REGDOM_SET_BY_USER)
-				continue;
-			list_move_tail(&reg_request->list, &tmp_reg_req_list);
-		}
+	list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {
+		if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER)
+			continue;
+		list_move_tail(&reg_request->list, &tmp_reg_req_list);
 	}
 	spin_unlock(&reg_requests_lock);
 
 	/* Clear beacon hints */
 	spin_lock_bh(&reg_pending_beacons_lock);
-	if (!list_empty(&reg_pending_beacons)) {
-		list_for_each_entry_safe(reg_beacon, btmp,
-					 &reg_pending_beacons, list) {
-			list_del(&reg_beacon->list);
-			kfree(reg_beacon);
-		}
+	list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
+		list_del(&reg_beacon->list);
+		kfree(reg_beacon);
 	}
 	spin_unlock_bh(&reg_pending_beacons_lock);
 
-	if (!list_empty(&reg_beacon_list)) {
-		list_for_each_entry_safe(reg_beacon, btmp,
-					 &reg_beacon_list, list) {
-			list_del(&reg_beacon->list);
-			kfree(reg_beacon);
-		}
+	list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
+		list_del(&reg_beacon->list);
+		kfree(reg_beacon);
 	}
 
 	/* First restore to the basic regulatory settings */
-	cfg80211_regdomain = cfg80211_world_regdom;
-	world_alpha2[0] = cfg80211_regdomain->alpha2[0];
-	world_alpha2[1] = cfg80211_regdomain->alpha2[1];
+	world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
+	world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
 
 	list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 		if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY)
 			restore_custom_reg_settings(&rdev->wiphy);
 	}
 
-	mutex_unlock(&reg_mutex);
-	mutex_unlock(&cfg80211_mutex);
-
 	regulatory_hint_core(world_alpha2);
 
 	/*
@@ -2011,20 +1899,8 @@ static void restore_regulatory_settings(bool reset_user)
 	if (is_an_alpha2(alpha2))
 		regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER);
 
-	if (list_empty(&tmp_reg_req_list))
-		return;
-
-	mutex_lock(&cfg80211_mutex);
-	mutex_lock(&reg_mutex);
-
 	spin_lock(&reg_requests_lock);
-	list_for_each_entry_safe(reg_request, tmp, &tmp_reg_req_list, list) {
-		REG_DBG_PRINT("Adding request for country %c%c back "
-			      "into the queue\n",
-			      reg_request->alpha2[0],
-			      reg_request->alpha2[1]);
-		list_move_tail(&reg_request->list, &reg_requests_list);
-	}
+	list_splice_tail_init(&tmp_reg_req_list, &reg_requests_list);
 	spin_unlock(&reg_requests_lock);
 
 	mutex_unlock(&reg_mutex);
@@ -2037,8 +1913,7 @@ static void restore_regulatory_settings(bool reset_user)
 
 void regulatory_hint_disconnect(void)
 {
-	REG_DBG_PRINT("All devices are disconnected, going to "
-		      "restore regulatory settings\n");
+	REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
 	restore_regulatory_settings(false);
 }
 
@@ -2051,31 +1926,48 @@ static bool freq_is_chan_12_13_14(u16 freq)
 	return false;
 }
 
+static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
+{
+	struct reg_beacon *pending_beacon;
+
+	list_for_each_entry(pending_beacon, &reg_pending_beacons, list)
+		if (beacon_chan->center_freq ==
+		    pending_beacon->chan.center_freq)
+			return true;
+	return false;
+}
+
 int regulatory_hint_found_beacon(struct wiphy *wiphy,
 				 struct ieee80211_channel *beacon_chan,
 				 gfp_t gfp)
 {
 	struct reg_beacon *reg_beacon;
+	bool processing;
 
-	if (likely((beacon_chan->beacon_found ||
-	    (beacon_chan->flags & IEEE80211_CHAN_RADAR) ||
+	if (beacon_chan->beacon_found ||
+	    beacon_chan->flags & IEEE80211_CHAN_RADAR ||
 	    (beacon_chan->band == IEEE80211_BAND_2GHZ &&
-	     !freq_is_chan_12_13_14(beacon_chan->center_freq)))))
+	     !freq_is_chan_12_13_14(beacon_chan->center_freq)))
+		return 0;
+
+	spin_lock_bh(&reg_pending_beacons_lock);
+	processing = pending_reg_beacon(beacon_chan);
+	spin_unlock_bh(&reg_pending_beacons_lock);
+
+	if (processing)
 		return 0;
 
 	reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
 	if (!reg_beacon)
 		return -ENOMEM;
 
-	REG_DBG_PRINT("Found new beacon on "
-		      "frequency: %d MHz (Ch %d) on %s\n",
+	REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
 		      beacon_chan->center_freq,
 		      ieee80211_frequency_to_channel(beacon_chan->center_freq),
 		      wiphy_name(wiphy));
 
 	memcpy(&reg_beacon->chan, beacon_chan,
-		sizeof(struct ieee80211_channel));
-
+	       sizeof(struct ieee80211_channel));
 
 	/*
 	 * Since we can be called from BH or and non-BH context
@@ -2155,21 +2047,19 @@ static void print_dfs_region(u8 dfs_region)
 		pr_info(" DFS Master region JP");
 		break;
 	default:
-		pr_info(" DFS Master region Uknown");
+		pr_info(" DFS Master region Unknown");
 		break;
 	}
 }
 
 static void print_regdomain(const struct ieee80211_regdomain *rd)
 {
+	struct regulatory_request *lr = get_last_request();
 
 	if (is_intersected_alpha2(rd->alpha2)) {
-
-		if (last_request->initiator ==
-		    NL80211_REGDOM_SET_BY_COUNTRY_IE) {
+		if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
 			struct cfg80211_registered_device *rdev;
-			rdev = cfg80211_rdev_by_wiphy_idx(
-				last_request->wiphy_idx);
+			rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
 			if (rdev) {
 				pr_info("Current regulatory domain updated by AP to: %c%c\n",
 					rdev->country_ie_alpha2[0],
@@ -2178,22 +2068,21 @@ static void print_regdomain(const struct ieee80211_regdomain *rd)
 				pr_info("Current regulatory domain intersected:\n");
 		} else
 			pr_info("Current regulatory domain intersected:\n");
-	} else if (is_world_regdom(rd->alpha2))
+	} else if (is_world_regdom(rd->alpha2)) {
 		pr_info("World regulatory domain updated:\n");
-	else {
+	} else {
 		if (is_unknown_alpha2(rd->alpha2))
 			pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
 		else {
-			if (reg_request_cell_base(last_request))
-				pr_info("Regulatory domain changed "
-					"to country: %c%c by Cell Station\n",
+			if (reg_request_cell_base(lr))
+				pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
 					rd->alpha2[0], rd->alpha2[1]);
 			else
-				pr_info("Regulatory domain changed "
-					"to country: %c%c\n",
+				pr_info("Regulatory domain changed to country: %c%c\n",
 					rd->alpha2[0], rd->alpha2[1]);
 		}
 	}
+
 	print_dfs_region(rd->dfs_region);
 	print_rd_rules(rd);
 }
@@ -2207,22 +2096,23 @@ static void print_regdomain_info(const struct ieee80211_regdomain *rd)
 /* Takes ownership of rd only if it doesn't fail */
 static int __set_regdom(const struct ieee80211_regdomain *rd)
 {
+	const struct ieee80211_regdomain *regd;
 	const struct ieee80211_regdomain *intersected_rd = NULL;
 	struct wiphy *request_wiphy;
+	struct regulatory_request *lr = get_last_request();
+
 	/* Some basic sanity checks first */
 
+	if (!reg_is_valid_request(rd->alpha2))
+		return -EINVAL;
+
 	if (is_world_regdom(rd->alpha2)) {
-		if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
-			return -EINVAL;
 		update_world_regdomain(rd);
 		return 0;
 	}
 
 	if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
-			!is_unknown_alpha2(rd->alpha2))
-		return -EINVAL;
-
-	if (!last_request)
+	    !is_unknown_alpha2(rd->alpha2))
 		return -EINVAL;
 
 	/*
@@ -2230,7 +2120,7 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
 	 * rd is non static (it means CRDA was present and was used last)
 	 * and the pending request came in from a country IE
 	 */
-	if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
+	if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
 		/*
 		 * If someone else asked us to change the rd lets only bother
 		 * checking if the alpha2 changes if CRDA was already called
@@ -2246,29 +2136,23 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
 	 * internal EEPROM data
 	 */
 
-	if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
-		return -EINVAL;
-
 	if (!is_valid_rd(rd)) {
 		pr_err("Invalid regulatory domain detected:\n");
 		print_regdomain_info(rd);
 		return -EINVAL;
 	}
 
-	request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
+	request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
 	if (!request_wiphy &&
-	    (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
-	     last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) {
+	    (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
+	     lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) {
 		schedule_delayed_work(&reg_timeout, 0);
 		return -ENODEV;
 	}
 
-	if (!last_request->intersect) {
-		int r;
-
-		if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) {
-			reset_regdomains(false);
-			cfg80211_regdomain = rd;
+	if (!lr->intersect) {
+		if (lr->initiator != NL80211_REGDOM_SET_BY_DRIVER) {
+			reset_regdomains(false, rd);
 			return 0;
 		}
 
@@ -2284,20 +2168,19 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
 		if (request_wiphy->regd)
 			return -EALREADY;
 
-		r = reg_copy_regd(&request_wiphy->regd, rd);
-		if (r)
-			return r;
+		regd = reg_copy_regd(rd);
+		if (IS_ERR(regd))
+			return PTR_ERR(regd);
 
-		reset_regdomains(false);
-		cfg80211_regdomain = rd;
+		rcu_assign_pointer(request_wiphy->regd, regd);
+		reset_regdomains(false, rd);
 		return 0;
 	}
 
 	/* Intersection requires a bit more work */
 
-	if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
-
-		intersected_rd = regdom_intersect(rd, cfg80211_regdomain);
+	if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
+		intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
 		if (!intersected_rd)
 			return -EINVAL;
 
@@ -2306,15 +2189,14 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
 		 * However if a driver requested this specific regulatory
 		 * domain we keep it for its private use
 		 */
-		if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER)
-			request_wiphy->regd = rd;
+		if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER)
+			rcu_assign_pointer(request_wiphy->regd, rd);
 		else
 			kfree(rd);
 
 		rd = NULL;
 
-		reset_regdomains(false);
-		cfg80211_regdomain = intersected_rd;
+		reset_regdomains(false, intersected_rd);
 
 		return 0;
 	}
@@ -2326,15 +2208,15 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
 /*
  * Use this call to set the current regulatory domain. Conflicts with
  * multiple drivers can be ironed out later. Caller must've already
- * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
+ * kmalloc'd the rd structure.
  */
 int set_regdom(const struct ieee80211_regdomain *rd)
 {
+	struct regulatory_request *lr;
 	int r;
 
-	assert_cfg80211_lock();
-
 	mutex_lock(&reg_mutex);
+	lr = get_last_request();
 
 	/* Note that this doesn't update the wiphys, this is done below */
 	r = __set_regdom(rd);
@@ -2343,23 +2225,25 @@ int set_regdom(const struct ieee80211_regdomain *rd)
 			reg_set_request_processed();
 
 		kfree(rd);
-		mutex_unlock(&reg_mutex);
-		return r;
+		goto out;
 	}
 
 	/* This would make this whole thing pointless */
-	if (!last_request->intersect)
-		BUG_ON(rd != cfg80211_regdomain);
+	if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) {
+		r = -EINVAL;
+		goto out;
+	}
 
 	/* update all wiphys now with the new established regulatory domain */
-	update_all_wiphy_regulatory(last_request->initiator);
+	update_all_wiphy_regulatory(lr->initiator);
 
-	print_regdomain(cfg80211_regdomain);
+	print_regdomain(get_cfg80211_regdom());
 
-	nl80211_send_reg_change_event(last_request);
+	nl80211_send_reg_change_event(lr);
 
 	reg_set_request_processed();
 
+ out:
 	mutex_unlock(&reg_mutex);
 
 	return r;
@@ -2367,20 +2251,26 @@ int set_regdom(const struct ieee80211_regdomain *rd)
 
 int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
-	if (last_request && !last_request->processed) {
-		if (add_uevent_var(env, "COUNTRY=%c%c",
-				   last_request->alpha2[0],
-				   last_request->alpha2[1]))
-			return -ENOMEM;
+	struct regulatory_request *lr;
+	u8 alpha2[2];
+	bool add = false;
+
+	rcu_read_lock();
+	lr = get_last_request();
+	if (lr && !lr->processed) {
+		memcpy(alpha2, lr->alpha2, 2);
+		add = true;
 	}
+	rcu_read_unlock();
 
+	if (add)
+		return add_uevent_var(env, "COUNTRY=%c%c",
+				      alpha2[0], alpha2[1]);
 	return 0;
 }
 
 void wiphy_regulatory_register(struct wiphy *wiphy)
 {
-	assert_cfg80211_lock();
-
 	mutex_lock(&reg_mutex);
 
 	if (!reg_dev_ignore_cell_hint(wiphy))
@@ -2395,32 +2285,32 @@ void wiphy_regulatory_register(struct wiphy *wiphy)
 void wiphy_regulatory_deregister(struct wiphy *wiphy)
 {
 	struct wiphy *request_wiphy = NULL;
-
-	assert_cfg80211_lock();
+	struct regulatory_request *lr;
 
 	mutex_lock(&reg_mutex);
+	lr = get_last_request();
 
 	if (!reg_dev_ignore_cell_hint(wiphy))
 		reg_num_devs_support_basehint--;
 
-	kfree(wiphy->regd);
+	rcu_free_regdom(get_wiphy_regdom(wiphy));
+	rcu_assign_pointer(wiphy->regd, NULL);
 
-	if (last_request)
-		request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
+	if (lr)
+		request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
 
 	if (!request_wiphy || request_wiphy != wiphy)
 		goto out;
 
-	last_request->wiphy_idx = WIPHY_IDX_STALE;
-	last_request->country_ie_env = ENVIRON_ANY;
+	lr->wiphy_idx = WIPHY_IDX_INVALID;
+	lr->country_ie_env = ENVIRON_ANY;
 out:
 	mutex_unlock(&reg_mutex);
 }
 
 static void reg_timeout_work(struct work_struct *work)
 {
-	REG_DBG_PRINT("Timeout while waiting for CRDA to reply, "
-		      "restoring regulatory settings\n");
+	REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
 	restore_regulatory_settings(true);
 }
 
@@ -2439,13 +2329,13 @@ int __init regulatory_init(void)
 
 	reg_regdb_size_check();
 
-	cfg80211_regdomain = cfg80211_world_regdom;
+	rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
 
 	user_alpha2[0] = '9';
 	user_alpha2[1] = '7';
 
 	/* We always try to get an update for the static regdomain */
-	err = regulatory_hint_core(cfg80211_regdomain->alpha2);
+	err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
 	if (err) {
 		if (err == -ENOMEM)
 			return err;
@@ -2457,10 +2347,6 @@ int __init regulatory_init(void)
 		 * errors as non-fatal.
 		 */
 		pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
-#ifdef CONFIG_CFG80211_REG_DEBUG
-		/* We want to find out exactly why when debugging */
-		WARN_ON(err);
-#endif
 	}
 
 	/*
@@ -2474,7 +2360,7 @@ int __init regulatory_init(void)
 	return 0;
 }
 
-void /* __init_or_exit */ regulatory_exit(void)
+void regulatory_exit(void)
 {
 	struct regulatory_request *reg_request, *tmp;
 	struct reg_beacon *reg_beacon, *btmp;
@@ -2482,43 +2368,27 @@ void /* __init_or_exit */ regulatory_exit(void)
 	cancel_work_sync(&reg_work);
 	cancel_delayed_work_sync(&reg_timeout);
 
-	mutex_lock(&cfg80211_mutex);
+	/* Lock to suppress warnings */
 	mutex_lock(&reg_mutex);
-
-	reset_regdomains(true);
+	reset_regdomains(true, NULL);
+	mutex_unlock(&reg_mutex);
 
 	dev_set_uevent_suppress(&reg_pdev->dev, true);
 
 	platform_device_unregister(reg_pdev);
 
-	spin_lock_bh(&reg_pending_beacons_lock);
-	if (!list_empty(&reg_pending_beacons)) {
-		list_for_each_entry_safe(reg_beacon, btmp,
-					 &reg_pending_beacons, list) {
-			list_del(&reg_beacon->list);
-			kfree(reg_beacon);
-		}
+	list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
+		list_del(&reg_beacon->list);
+		kfree(reg_beacon);
 	}
-	spin_unlock_bh(&reg_pending_beacons_lock);
 
-	if (!list_empty(&reg_beacon_list)) {
-		list_for_each_entry_safe(reg_beacon, btmp,
-					 &reg_beacon_list, list) {
-			list_del(&reg_beacon->list);
-			kfree(reg_beacon);
-		}
+	list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
+		list_del(&reg_beacon->list);
+		kfree(reg_beacon);
 	}
 
-	spin_lock(&reg_requests_lock);
-	if (!list_empty(&reg_requests_list)) {
-		list_for_each_entry_safe(reg_request, tmp,
-					 &reg_requests_list, list) {
-			list_del(&reg_request->list);
-			kfree(reg_request);
-		}
+	list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {
+		list_del(&reg_request->list);
+		kfree(reg_request);
 	}
-	spin_unlock(&reg_requests_lock);
-
-	mutex_unlock(&reg_mutex);
-	mutex_unlock(&cfg80211_mutex);
 }
diff --git a/net/wireless/reg.h b/net/wireless/reg.h
index 4c0a32ffd530..af2d5f8a5d82 100644
--- a/net/wireless/reg.h
+++ b/net/wireless/reg.h
@@ -16,10 +16,9 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-extern const struct ieee80211_regdomain *cfg80211_regdomain;
+extern const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
 
 bool is_world_regdom(const char *alpha2);
-bool reg_is_valid_request(const char *alpha2);
 bool reg_supported_dfs_region(u8 dfs_region);
 
 int regulatory_hint_user(const char *alpha2,
@@ -55,8 +54,8 @@ bool reg_last_request_cell_base(void);
  * set the wiphy->disable_beacon_hints to true.
  */
 int regulatory_hint_found_beacon(struct wiphy *wiphy,
-					struct ieee80211_channel *beacon_chan,
-					gfp_t gfp);
+				 struct ieee80211_channel *beacon_chan,
+				 gfp_t gfp);
 
 /**
  * regulatory_hint_11d - hints a country IE as a regulatory domain
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index f2431e41a373..a825dfe12cf7 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -192,7 +192,8 @@ static int cfg80211_conn_do_work(struct wireless_dev *wdev)
 					    prev_bssid,
 					    params->ssid, params->ssid_len,
 					    params->ie, params->ie_len,
-					    false, &params->crypto,
+					    params->mfp != NL80211_MFP_NO,
+					    &params->crypto,
 					    params->flags, &params->ht_capa,
 					    &params->ht_capa_mask);
 		if (err)
@@ -519,10 +520,8 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 	 * - country_ie + 2, the start of the country ie data, and
 	 * - and country_ie[1] which is the IE length
 	 */
-	regulatory_hint_11d(wdev->wiphy,
-			    bss->channel->band,
-			    country_ie + 2,
-			    country_ie[1]);
+	regulatory_hint_11d(wdev->wiphy, bss->channel->band,
+			    country_ie + 2, country_ie[1]);
 	kfree(country_ie);
 }
 
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 16d76a807c2f..1c2795d52db0 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1184,7 +1184,8 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
 				 struct wireless_dev *wdev,
 				 enum nl80211_iftype iftype,
 				 struct ieee80211_channel *chan,
-				 enum cfg80211_chan_mode chanmode)
+				 enum cfg80211_chan_mode chanmode,
+				 u8 radar_detect)
 {
 	struct wireless_dev *wdev_iter;
 	u32 used_iftypes = BIT(iftype);
@@ -1195,14 +1196,45 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
 	enum cfg80211_chan_mode chmode;
 	int num_different_channels = 0;
 	int total = 1;
+	bool radar_required;
 	int i, j;
 
 	ASSERT_RTNL();
 	lockdep_assert_held(&rdev->devlist_mtx);
 
+	if (WARN_ON(hweight32(radar_detect) > 1))
+		return -EINVAL;
+
+	switch (iftype) {
+	case NL80211_IFTYPE_ADHOC:
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_AP_VLAN:
+	case NL80211_IFTYPE_MESH_POINT:
+	case NL80211_IFTYPE_P2P_GO:
+	case NL80211_IFTYPE_WDS:
+		radar_required = !!(chan->flags & IEEE80211_CHAN_RADAR);
+		break;
+	case NL80211_IFTYPE_P2P_CLIENT:
+	case NL80211_IFTYPE_STATION:
+	case NL80211_IFTYPE_MONITOR:
+		radar_required = false;
+		break;
+	case NL80211_IFTYPE_P2P_DEVICE:
+	case NUM_NL80211_IFTYPES:
+	case NL80211_IFTYPE_UNSPECIFIED:
+	default:
+		return -EINVAL;
+	}
+
+	if (radar_required && !radar_detect)
+		return -EINVAL;
+
 	/* Always allow software iftypes */
-	if (rdev->wiphy.software_iftypes & BIT(iftype))
+	if (rdev->wiphy.software_iftypes & BIT(iftype)) {
+		if (radar_detect)
+			return -EINVAL;
 		return 0;
+	}
 
 	memset(num, 0, sizeof(num));
 	memset(used_channels, 0, sizeof(used_channels));
@@ -1275,7 +1307,7 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
 		used_iftypes |= BIT(wdev_iter->iftype);
 	}
 
-	if (total == 1)
+	if (total == 1 && !radar_detect)
 		return 0;
 
 	for (i = 0; i < rdev->wiphy.n_iface_combinations; i++) {
@@ -1308,6 +1340,9 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
 			}
 		}
 
+		if (radar_detect && !(c->radar_detect_widths & radar_detect))
+			goto cont;
+
 		/*
 		 * Finally check that all iftypes that we're currently
 		 * using are actually part of this combination. If they